Prettify Dual X Carriage description

Marlin/Configuration_adv.h

   #endif
 #endif
 
-// Enable this for dual x-carriage printers.
-// A dual x-carriage design has the advantage that the inactive extruder can be parked which
-// prevents hot-end ooze contaminating the print. It also reduces the weight of each x-carriage
-// allowing faster printing speeds. Connect your X2 stepper to the first unused E plug.
+/**
+ * Dual X Carriage
+ *
+ * This setup has two X carriages that can move independently, each with its own hotend.
+ * The carriages can be used to print an object with two colors or materials, or in
+ * "duplication mode" it can print two identical or X-mirrored objects simultaneously.
+ * The inactive carriage is parked automatically to prevent oozing.
+ * X1 is the left carriage, X2 the right. They park and home at opposite ends of the X axis.
+ * By default the X2 stepper is assigned to the first unused E plug on the board.
+ */
 //#define DUAL_X_CARRIAGE
 #if ENABLED(DUAL_X_CARRIAGE)
-  // Configuration for second X-carriage
-  // Note: the first x-carriage is defined as the x-carriage which homes to the minimum endstop;
-  // the second x-carriage always homes to the maximum endstop.
   #define X1_MIN_POS X_MIN_POS  // set minimum to ensure first x-carriage doesn't hit the parked second X-carriage
   #define X1_MAX_POS X_BED_SIZE // set maximum to ensure first x-carriage doesn't hit the parked second X-carriage
   #define X2_MIN_POS 80     // set minimum to ensure second x-carriage doesn't hit the parked first X-carriage

Marlin/src/config/default/Configuration_adv.h

   #endif
 #endif
 
-// Enable this for dual x-carriage printers.
-// A dual x-carriage design has the advantage that the inactive extruder can be parked which
-// prevents hot-end ooze contaminating the print. It also reduces the weight of each x-carriage
-// allowing faster printing speeds. Connect your X2 stepper to the first unused E plug.
+/**
+ * Dual X Carriage
+ *
+ * This setup has two X carriages that can move independently, each with its own hotend.
+ * The carriages can be used to print an object with two colors or materials, or in
+ * "duplication mode" it can print two identical or X-mirrored objects simultaneously.
+ * The inactive carriage is parked automatically to prevent oozing.
+ * X1 is the left carriage, X2 the right. They park and home at opposite ends of the X axis.
+ * By default the X2 stepper is assigned to the first unused E plug on the board.
+ */
 //#define DUAL_X_CARRIAGE
 #if ENABLED(DUAL_X_CARRIAGE)
-  // Configuration for second X-carriage
-  // Note: the first x-carriage is defined as the x-carriage which homes to the minimum endstop;
-  // the second x-carriage always homes to the maximum endstop.
   #define X1_MIN_POS X_MIN_POS  // set minimum to ensure first x-carriage doesn't hit the parked second X-carriage
   #define X1_MAX_POS X_BED_SIZE // set maximum to ensure first x-carriage doesn't hit the parked second X-carriage
   #define X2_MIN_POS 80     // set minimum to ensure second x-carriage doesn't hit the parked first X-carriage

Marlin/src/config/examples/AlephObjects/TAZ4/Configuration_adv.h

   #endif
 #endif
 
-// Enable this for dual x-carriage printers.
-// A dual x-carriage design has the advantage that the inactive extruder can be parked which
-// prevents hot-end ooze contaminating the print. It also reduces the weight of each x-carriage
-// allowing faster printing speeds. Connect your X2 stepper to the first unused E plug.
+/**
+ * Dual X Carriage
+ *
+ * This setup has two X carriages that can move independently, each with its own hotend.
+ * The carriages can be used to print an object with two colors or materials, or in
+ * "duplication mode" it can print two identical or X-mirrored objects simultaneously.
+ * The inactive carriage is parked automatically to prevent oozing.
+ * X1 is the left carriage, X2 the right. They park and home at opposite ends of the X axis.
+ * By default the X2 stepper is assigned to the first unused E plug on the board.
+ */
 //#define DUAL_X_CARRIAGE
 #if ENABLED(DUAL_X_CARRIAGE)
-  // Configuration for second X-carriage
-  // Note: the first x-carriage is defined as the x-carriage which homes to the minimum endstop;
-  // the second x-carriage always homes to the maximum endstop.
   #define X1_MIN_POS X_MIN_POS  // set minimum to ensure first x-carriage doesn't hit the parked second X-carriage
   #define X1_MAX_POS X_BED_SIZE // set maximum to ensure first x-carriage doesn't hit the parked second X-carriage
   #define X2_MIN_POS 80     // set minimum to ensure second x-carriage doesn't hit the parked first X-carriage

Marlin/src/config/examples/Anet/A6/Configuration_adv.h

   #endif
 #endif
 
-// Enable this for dual x-carriage printers.
-// A dual x-carriage design has the advantage that the inactive extruder can be parked which
-// prevents hot-end ooze contaminating the print. It also reduces the weight of each x-carriage
-// allowing faster printing speeds. Connect your X2 stepper to the first unused E plug.
+/**
+ * Dual X Carriage
+ *
+ * This setup has two X carriages that can move independently, each with its own hotend.
+ * The carriages can be used to print an object with two colors or materials, or in
+ * "duplication mode" it can print two identical or X-mirrored objects simultaneously.
+ * The inactive carriage is parked automatically to prevent oozing.
+ * X1 is the left carriage, X2 the right. They park and home at opposite ends of the X axis.
+ * By default the X2 stepper is assigned to the first unused E plug on the board.
+ */
 //#define DUAL_X_CARRIAGE
 #if ENABLED(DUAL_X_CARRIAGE)
-  // Configuration for second X-carriage
-  // Note: the first x-carriage is defined as the x-carriage which homes to the minimum endstop;
-  // the second x-carriage always homes to the maximum endstop.
   #define X1_MIN_POS X_MIN_POS  // set minimum to ensure first x-carriage doesn't hit the parked second X-carriage
   #define X1_MAX_POS X_BED_SIZE // set maximum to ensure first x-carriage doesn't hit the parked second X-carriage
   #define X2_MIN_POS 80     // set minimum to ensure second x-carriage doesn't hit the parked first X-carriage

Marlin/src/config/examples/Anet/A8/Configuration_adv.h

   #endif
 #endif
 
-// Enable this for dual x-carriage printers.
-// A dual x-carriage design has the advantage that the inactive extruder can be parked which
-// prevents hot-end ooze contaminating the print. It also reduces the weight of each x-carriage
-// allowing faster printing speeds. Connect your X2 stepper to the first unused E plug.
+/**
+ * Dual X Carriage
+ *
+ * This setup has two X carriages that can move independently, each with its own hotend.
+ * The carriages can be used to print an object with two colors or materials, or in
+ * "duplication mode" it can print two identical or X-mirrored objects simultaneously.
+ * The inactive carriage is parked automatically to prevent oozing.
+ * X1 is the left carriage, X2 the right. They park and home at opposite ends of the X axis.
+ * By default the X2 stepper is assigned to the first unused E plug on the board.
+ */
 //#define DUAL_X_CARRIAGE
 #if ENABLED(DUAL_X_CARRIAGE)
-  // Configuration for second X-carriage
-  // Note: the first x-carriage is defined as the x-carriage which homes to the minimum endstop;
-  // the second x-carriage always homes to the maximum endstop.
   #define X1_MIN_POS X_MIN_POS  // set minimum to ensure first x-carriage doesn't hit the parked second X-carriage
   #define X1_MAX_POS X_BED_SIZE // set maximum to ensure first x-carriage doesn't hit the parked second X-carriage
   #define X2_MIN_POS 80     // set minimum to ensure second x-carriage doesn't hit the parked first X-carriage

Marlin/src/config/examples/Azteeg/X5GT/Configuration_adv.h

   #endif
 #endif
 
-// Enable this for dual x-carriage printers.
-// A dual x-carriage design has the advantage that the inactive extruder can be parked which
-// prevents hot-end ooze contaminating the print. It also reduces the weight of each x-carriage
-// allowing faster printing speeds. Connect your X2 stepper to the first unused E plug.
+/**
+ * Dual X Carriage
+ *
+ * This setup has two X carriages that can move independently, each with its own hotend.
+ * The carriages can be used to print an object with two colors or materials, or in
+ * "duplication mode" it can print two identical or X-mirrored objects simultaneously.
+ * The inactive carriage is parked automatically to prevent oozing.
+ * X1 is the left carriage, X2 the right. They park and home at opposite ends of the X axis.
+ * By default the X2 stepper is assigned to the first unused E plug on the board.
+ */
 //#define DUAL_X_CARRIAGE
 #if ENABLED(DUAL_X_CARRIAGE)
-  // Configuration for second X-carriage
-  // Note: the first x-carriage is defined as the x-carriage which homes to the minimum endstop;
-  // the second x-carriage always homes to the maximum endstop.
   #define X1_MIN_POS X_MIN_POS  // set minimum to ensure first x-carriage doesn't hit the parked second X-carriage
   #define X1_MAX_POS X_BED_SIZE // set maximum to ensure first x-carriage doesn't hit the parked second X-carriage
   #define X2_MIN_POS 80     // set minimum to ensure second x-carriage doesn't hit the parked first X-carriage

Marlin/src/config/examples/BIBO/TouchX/cyclops/Configuration_adv.h

   #endif
 #endif
 
-// Enable this for dual x-carriage printers.
-// A dual x-carriage design has the advantage that the inactive extruder can be parked which
-// prevents hot-end ooze contaminating the print. It also reduces the weight of each x-carriage
-// allowing faster printing speeds. Connect your X2 stepper to the first unused E plug.
+/**
+ * Dual X Carriage
+ *
+ * This setup has two X carriages that can move independently, each with its own hotend.
+ * The carriages can be used to print an object with two colors or materials, or in
+ * "duplication mode" it can print two identical or X-mirrored objects simultaneously.
+ * The inactive carriage is parked automatically to prevent oozing.
+ * X1 is the left carriage, X2 the right. They park and home at opposite ends of the X axis.
+ * By default the X2 stepper is assigned to the first unused E plug on the board.
+ */
 //#define DUAL_X_CARRIAGE
 #if ENABLED(DUAL_X_CARRIAGE)
-  // Configuration for second X-carriage
-  // Note: the first x-carriage is defined as the x-carriage which homes to the minimum endstop;
-  // the second x-carriage always homes to the maximum endstop.
   #define X1_MIN_POS X_MIN_POS  // set minimum to ensure first x-carriage doesn't hit the parked second X-carriage
   #define X1_MAX_POS X_BED_SIZE // set maximum to ensure first x-carriage doesn't hit the parked second X-carriage
   #define X2_MIN_POS 80     // set minimum to ensure second x-carriage doesn't hit the parked first X-carriage

Marlin/src/config/examples/BIBO/TouchX/default/Configuration_adv.h

   #endif
 #endif
 
-// Enable this for dual x-carriage printers.
-// A dual x-carriage design has the advantage that the inactive extruder can be parked which
-// prevents hot-end ooze contaminating the print. It also reduces the weight of each x-carriage
-// allowing faster printing speeds. Connect your X2 stepper to the first unused E plug.
+/**
+ * Dual X Carriage
+ *
+ * This setup has two X carriages that can move independently, each with its own hotend.
+ * The carriages can be used to print an object with two colors or materials, or in
+ * "duplication mode" it can print two identical or X-mirrored objects simultaneously.
+ * The inactive carriage is parked automatically to prevent oozing.
+ * X1 is the left carriage, X2 the right. They park and home at opposite ends of the X axis.
+ * By default the X2 stepper is assigned to the first unused E plug on the board.
+ */
 //#define DUAL_X_CARRIAGE
 #if ENABLED(DUAL_X_CARRIAGE)
-  // Configuration for second X-carriage
-  // Note: the first x-carriage is defined as the x-carriage which homes to the minimum endstop;
-  // the second x-carriage always homes to the maximum endstop.
   #define X1_MIN_POS X_MIN_POS  // set minimum to ensure first x-carriage doesn't hit the parked second X-carriage
   #define X1_MAX_POS X_BED_SIZE // set maximum to ensure first x-carriage doesn't hit the parked second X-carriage
   #define X2_MIN_POS 80     // set minimum to ensure second x-carriage doesn't hit the parked first X-carriage

Marlin/src/config/examples/BQ/Hephestos/Configuration_adv.h

   #endif
 #endif
 
-// Enable this for dual x-carriage printers.
-// A dual x-carriage design has the advantage that the inactive extruder can be parked which
-// prevents hot-end ooze contaminating the print. It also reduces the weight of each x-carriage
-// allowing faster printing speeds. Connect your X2 stepper to the first unused E plug.
+/**
+ * Dual X Carriage
+ *
+ * This setup has two X carriages that can move independently, each with its own hotend.
+ * The carriages can be used to print an object with two colors or materials, or in
+ * "duplication mode" it can print two identical or X-mirrored objects simultaneously.
+ * The inactive carriage is parked automatically to prevent oozing.
+ * X1 is the left carriage, X2 the right. They park and home at opposite ends of the X axis.
+ * By default the X2 stepper is assigned to the first unused E plug on the board.
+ */
 //#define DUAL_X_CARRIAGE
 #if ENABLED(DUAL_X_CARRIAGE)
-  // Configuration for second X-carriage
-  // Note: the first x-carriage is defined as the x-carriage which homes to the minimum endstop;
-  // the second x-carriage always homes to the maximum endstop.
   #define X1_MIN_POS X_MIN_POS  // set minimum to ensure first x-carriage doesn't hit the parked second X-carriage
   #define X1_MAX_POS X_BED_SIZE // set maximum to ensure first x-carriage doesn't hit the parked second X-carriage
   #define X2_MIN_POS 80     // set minimum to ensure second x-carriage doesn't hit the parked first X-carriage

Marlin/src/config/examples/BQ/Hephestos_2/Configuration_adv.h

   #endif
 #endif
 
-// Enable this for dual x-carriage printers.
-// A dual x-carriage design has the advantage that the inactive extruder can be parked which
-// prevents hot-end ooze contaminating the print. It also reduces the weight of each x-carriage
-// allowing faster printing speeds. Connect your X2 stepper to the first unused E plug.
+/**
+ * Dual X Carriage
+ *
+ * This setup has two X carriages that can move independently, each with its own hotend.
+ * The carriages can be used to print an object with two colors or materials, or in
+ * "duplication mode" it can print two identical or X-mirrored objects simultaneously.
+ * The inactive carriage is parked automatically to prevent oozing.
+ * X1 is the left carriage, X2 the right. They park and home at opposite ends of the X axis.
+ * By default the X2 stepper is assigned to the first unused E plug on the board.
+ */
 //#define DUAL_X_CARRIAGE
 #if ENABLED(DUAL_X_CARRIAGE)
-  // Configuration for second X-carriage
-  // Note: the first x-carriage is defined as the x-carriage which homes to the minimum endstop;
-  // the second x-carriage always homes to the maximum endstop.
   #define X1_MIN_POS X_MIN_POS  // set minimum to ensure first x-carriage doesn't hit the parked second X-carriage
   #define X1_MAX_POS X_BED_SIZE // set maximum to ensure first x-carriage doesn't hit the parked second X-carriage
   #define X2_MIN_POS 80     // set minimum to ensure second x-carriage doesn't hit the parked first X-carriage

Marlin/src/config/examples/BQ/WITBOX/Configuration_adv.h

   #endif
 #endif
 
-// Enable this for dual x-carriage printers.
-// A dual x-carriage design has the advantage that the inactive extruder can be parked which
-// prevents hot-end ooze contaminating the print. It also reduces the weight of each x-carriage
-// allowing faster printing speeds. Connect your X2 stepper to the first unused E plug.
+/**
+ * Dual X Carriage
+ *
+ * This setup has two X carriages that can move independently, each with its own hotend.
+ * The carriages can be used to print an object with two colors or materials, or in
+ * "duplication mode" it can print two identical or X-mirrored objects simultaneously.
+ * The inactive carriage is parked automatically to prevent oozing.
+ * X1 is the left carriage, X2 the right. They park and home at opposite ends of the X axis.
+ * By default the X2 stepper is assigned to the first unused E plug on the board.
+ */
 //#define DUAL_X_CARRIAGE
 #if ENABLED(DUAL_X_CARRIAGE)
-  // Configuration for second X-carriage
-  // Note: the first x-carriage is defined as the x-carriage which homes to the minimum endstop;
-  // the second x-carriage always homes to the maximum endstop.
   #define X1_MIN_POS X_MIN_POS  // set minimum to ensure first x-carriage doesn't hit the parked second X-carriage
   #define X1_MAX_POS X_BED_SIZE // set maximum to ensure first x-carriage doesn't hit the parked second X-carriage
   #define X2_MIN_POS 80     // set minimum to ensure second x-carriage doesn't hit the parked first X-carriage

Marlin/src/config/examples/Cartesio/Configuration_adv.h

   #endif
 #endif
 
-// Enable this for dual x-carriage printers.
-// A dual x-carriage design has the advantage that the inactive extruder can be parked which
-// prevents hot-end ooze contaminating the print. It also reduces the weight of each x-carriage
-// allowing faster printing speeds. Connect your X2 stepper to the first unused E plug.
+/**
+ * Dual X Carriage
+ *
+ * This setup has two X carriages that can move independently, each with its own hotend.
+ * The carriages can be used to print an object with two colors or materials, or in
+ * "duplication mode" it can print two identical or X-mirrored objects simultaneously.
+ * The inactive carriage is parked automatically to prevent oozing.
+ * X1 is the left carriage, X2 the right. They park and home at opposite ends of the X axis.
+ * By default the X2 stepper is assigned to the first unused E plug on the board.
+ */
 //#define DUAL_X_CARRIAGE
 #if ENABLED(DUAL_X_CARRIAGE)
-  // Configuration for second X-carriage
-  // Note: the first x-carriage is defined as the x-carriage which homes to the minimum endstop;
-  // the second x-carriage always homes to the maximum endstop.
   #define X1_MIN_POS X_MIN_POS  // set minimum to ensure first x-carriage doesn't hit the parked second X-carriage
   #define X1_MAX_POS X_BED_SIZE // set maximum to ensure first x-carriage doesn't hit the parked second X-carriage
   #define X2_MIN_POS 80     // set minimum to ensure second x-carriage doesn't hit the parked first X-carriage

Marlin/src/config/examples/Creality/CR-10/Configuration_adv.h

   #endif
 #endif
 
-// Enable this for dual x-carriage printers.
-// A dual x-carriage design has the advantage that the inactive extruder can be parked which
-// prevents hot-end ooze contaminating the print. It also reduces the weight of each x-carriage
-// allowing faster printing speeds. Connect your X2 stepper to the first unused E plug.
+/**
+ * Dual X Carriage
+ *
+ * This setup has two X carriages that can move independently, each with its own hotend.
+ * The carriages can be used to print an object with two colors or materials, or in
+ * "duplication mode" it can print two identical or X-mirrored objects simultaneously.
+ * The inactive carriage is parked automatically to prevent oozing.
+ * X1 is the left carriage, X2 the right. They park and home at opposite ends of the X axis.
+ * By default the X2 stepper is assigned to the first unused E plug on the board.
+ */
 //#define DUAL_X_CARRIAGE
 #if ENABLED(DUAL_X_CARRIAGE)
-  // Configuration for second X-carriage
-  // Note: the first x-carriage is defined as the x-carriage which homes to the minimum endstop;
-  // the second x-carriage always homes to the maximum endstop.
   #define X1_MIN_POS X_MIN_POS  // set minimum to ensure first x-carriage doesn't hit the parked second X-carriage
   #define X1_MAX_POS X_BED_SIZE // set maximum to ensure first x-carriage doesn't hit the parked second X-carriage
   #define X2_MIN_POS 80     // set minimum to ensure second x-carriage doesn't hit the parked first X-carriage

Marlin/src/config/examples/Creality/CR-10S/Configuration_adv.h

   #endif
 #endif
 
-// Enable this for dual x-carriage printers.
-// A dual x-carriage design has the advantage that the inactive extruder can be parked which
-// prevents hot-end ooze contaminating the print. It also reduces the weight of each x-carriage
-// allowing faster printing speeds. Connect your X2 stepper to the first unused E plug.
+/**
+ * Dual X Carriage
+ *
+ * This setup has two X carriages that can move independently, each with its own hotend.
+ * The carriages can be used to print an object with two colors or materials, or in
+ * "duplication mode" it can print two identical or X-mirrored objects simultaneously.
+ * The inactive carriage is parked automatically to prevent oozing.
+ * X1 is the left carriage, X2 the right. They park and home at opposite ends of the X axis.
+ * By default the X2 stepper is assigned to the first unused E plug on the board.
+ */
 //#define DUAL_X_CARRIAGE
 #if ENABLED(DUAL_X_CARRIAGE)
-  // Configuration for second X-carriage
-  // Note: the first x-carriage is defined as the x-carriage which homes to the minimum endstop;
-  // the second x-carriage always homes to the maximum endstop.
   #define X1_MIN_POS X_MIN_POS  // set minimum to ensure first x-carriage doesn't hit the parked second X-carriage
   #define X1_MAX_POS X_BED_SIZE // set maximum to ensure first x-carriage doesn't hit the parked second X-carriage
   #define X2_MIN_POS 80     // set minimum to ensure second x-carriage doesn't hit the parked first X-carriage

Marlin/src/config/examples/Creality/CR-10mini/Configuration_adv.h

   #endif
 #endif
 
-// Enable this for dual x-carriage printers.
-// A dual x-carriage design has the advantage that the inactive extruder can be parked which
-// prevents hot-end ooze contaminating the print. It also reduces the weight of each x-carriage
-// allowing faster printing speeds. Connect your X2 stepper to the first unused E plug.
+/**
+ * Dual X Carriage
+ *
+ * This setup has two X carriages that can move independently, each with its own hotend.
+ * The carriages can be used to print an object with two colors or materials, or in
+ * "duplication mode" it can print two identical or X-mirrored objects simultaneously.
+ * The inactive carriage is parked automatically to prevent oozing.
+ * X1 is the left carriage, X2 the right. They park and home at opposite ends of the X axis.
+ * By default the X2 stepper is assigned to the first unused E plug on the board.
+ */
 //#define DUAL_X_CARRIAGE
 #if ENABLED(DUAL_X_CARRIAGE)
-  // Configuration for second X-carriage
-  // Note: the first x-carriage is defined as the x-carriage which homes to the minimum endstop;
-  // the second x-carriage always homes to the maximum endstop.
   #define X1_MIN_POS X_MIN_POS  // set minimum to ensure first x-carriage doesn't hit the parked second X-carriage
   #define X1_MAX_POS X_BED_SIZE // set maximum to ensure first x-carriage doesn't hit the parked second X-carriage
   #define X2_MIN_POS 80     // set minimum to ensure second x-carriage doesn't hit the parked first X-carriage

Marlin/src/config/examples/Creality/CR-8/Configuration_adv.h

   #endif
 #endif
 
-// Enable this for dual x-carriage printers.
-// A dual x-carriage design has the advantage that the inactive extruder can be parked which
-// prevents hot-end ooze contaminating the print. It also reduces the weight of each x-carriage
-// allowing faster printing speeds. Connect your X2 stepper to the first unused E plug.
+/**
+ * Dual X Carriage
+ *
+ * This setup has two X carriages that can move independently, each with its own hotend.
+ * The carriages can be used to print an object with two colors or materials, or in
+ * "duplication mode" it can print two identical or X-mirrored objects simultaneously.
+ * The inactive carriage is parked automatically to prevent oozing.
+ * X1 is the left carriage, X2 the right. They park and home at opposite ends of the X axis.
+ * By default the X2 stepper is assigned to the first unused E plug on the board.
+ */
 //#define DUAL_X_CARRIAGE
 #if ENABLED(DUAL_X_CARRIAGE)
-  // Configuration for second X-carriage
-  // Note: the first x-carriage is defined as the x-carriage which homes to the minimum endstop;
-  // the second x-carriage always homes to the maximum endstop.
   #define X1_MIN_POS X_MIN_POS  // set minimum to ensure first x-carriage doesn't hit the parked second X-carriage
   #define X1_MAX_POS X_BED_SIZE // set maximum to ensure first x-carriage doesn't hit the parked second X-carriage
   #define X2_MIN_POS 80     // set minimum to ensure second x-carriage doesn't hit the parked first X-carriage

Marlin/src/config/examples/Creality/Ender-2/Configuration_adv.h

   #endif
 #endif
 
-// Enable this for dual x-carriage printers.
-// A dual x-carriage design has the advantage that the inactive extruder can be parked which
-// prevents hot-end ooze contaminating the print. It also reduces the weight of each x-carriage
-// allowing faster printing speeds. Connect your X2 stepper to the first unused E plug.
+/**
+ * Dual X Carriage
+ *
+ * This setup has two X carriages that can move independently, each with its own hotend.
+ * The carriages can be used to print an object with two colors or materials, or in
+ * "duplication mode" it can print two identical or X-mirrored objects simultaneously.
+ * The inactive carriage is parked automatically to prevent oozing.
+ * X1 is the left carriage, X2 the right. They park and home at opposite ends of the X axis.
+ * By default the X2 stepper is assigned to the first unused E plug on the board.
+ */
 //#define DUAL_X_CARRIAGE
 #if ENABLED(DUAL_X_CARRIAGE)
-  // Configuration for second X-carriage
-  // Note: the first x-carriage is defined as the x-carriage which homes to the minimum endstop;
-  // the second x-carriage always homes to the maximum endstop.
   #define X1_MIN_POS X_MIN_POS  // set minimum to ensure first x-carriage doesn't hit the parked second X-carriage
   #define X1_MAX_POS X_BED_SIZE // set maximum to ensure first x-carriage doesn't hit the parked second X-carriage
   #define X2_MIN_POS 80     // set minimum to ensure second x-carriage doesn't hit the parked first X-carriage

Marlin/src/config/examples/Creality/Ender-3/Configuration_adv.h

   #endif
 #endif
 
-// Enable this for dual x-carriage printers.
-// A dual x-carriage design has the advantage that the inactive extruder can be parked which
-// prevents hot-end ooze contaminating the print. It also reduces the weight of each x-carriage
-// allowing faster printing speeds. Connect your X2 stepper to the first unused E plug.
+/**
+ * Dual X Carriage
+ *
+ * This setup has two X carriages that can move independently, each with its own hotend.
+ * The carriages can be used to print an object with two colors or materials, or in
+ * "duplication mode" it can print two identical or X-mirrored objects simultaneously.
+ * The inactive carriage is parked automatically to prevent oozing.
+ * X1 is the left carriage, X2 the right. They park and home at opposite ends of the X axis.
+ * By default the X2 stepper is assigned to the first unused E plug on the board.
+ */
 //#define DUAL_X_CARRIAGE
 #if ENABLED(DUAL_X_CARRIAGE)
-  // Configuration for second X-carriage
-  // Note: the first x-carriage is defined as the x-carriage which homes to the minimum endstop;
-  // the second x-carriage always homes to the maximum endstop.
   #define X1_MIN_POS X_MIN_POS  // set minimum to ensure first x-carriage doesn't hit the parked second X-carriage
   #define X1_MAX_POS X_BED_SIZE // set maximum to ensure first x-carriage doesn't hit the parked second X-carriage
   #define X2_MIN_POS 80     // set minimum to ensure second x-carriage doesn't hit the parked first X-carriage

Marlin/src/config/examples/Creality/Ender-4/Configuration_adv.h

   #endif
 #endif
 
-// Enable this for dual x-carriage printers.
-// A dual x-carriage design has the advantage that the inactive extruder can be parked which
-// prevents hot-end ooze contaminating the print. It also reduces the weight of each x-carriage
-// allowing faster printing speeds. Connect your X2 stepper to the first unused E plug.
+/**
+ * Dual X Carriage
+ *
+ * This setup has two X carriages that can move independently, each with its own hotend.
+ * The carriages can be used to print an object with two colors or materials, or in
+ * "duplication mode" it can print two identical or X-mirrored objects simultaneously.
+ * The inactive carriage is parked automatically to prevent oozing.
+ * X1 is the left carriage, X2 the right. They park and home at opposite ends of the X axis.
+ * By default the X2 stepper is assigned to the first unused E plug on the board.
+ */
 //#define DUAL_X_CARRIAGE
 #if ENABLED(DUAL_X_CARRIAGE)
-  // Configuration for second X-carriage
-  // Note: the first x-carriage is defined as the x-carriage which homes to the minimum endstop;
-  // the second x-carriage always homes to the maximum endstop.
   #define X1_MIN_POS X_MIN_POS  // set minimum to ensure first x-carriage doesn't hit the parked second X-carriage
   #define X1_MAX_POS X_BED_SIZE // set maximum to ensure first x-carriage doesn't hit the parked second X-carriage
   #define X2_MIN_POS 80     // set minimum to ensure second x-carriage doesn't hit the parked first X-carriage

Marlin/src/config/examples/Einstart-S/Configuration_adv.h

   #endif
 #endif
 
-// Enable this for dual x-carriage printers.
-// A dual x-carriage design has the advantage that the inactive extruder can be parked which
-// prevents hot-end ooze contaminating the print. It also reduces the weight of each x-carriage
-// allowing faster printing speeds. Connect your X2 stepper to the first unused E plug.
+/**
+ * Dual X Carriage
+ *
+ * This setup has two X carriages that can move independently, each with its own hotend.
+ * The carriages can be used to print an object with two colors or materials, or in
+ * "duplication mode" it can print two identical or X-mirrored objects simultaneously.
+ * The inactive carriage is parked automatically to prevent oozing.
+ * X1 is the left carriage, X2 the right. They park and home at opposite ends of the X axis.
+ * By default the X2 stepper is assigned to the first unused E plug on the board.
+ */
 //#define DUAL_X_CARRIAGE
 #if ENABLED(DUAL_X_CARRIAGE)
-  // Configuration for second X-carriage
-  // Note: the first x-carriage is defined as the x-carriage which homes to the minimum endstop;
-  // the second x-carriage always homes to the maximum endstop.
   #define X1_MIN_POS X_MIN_POS  // set minimum to ensure first x-carriage doesn't hit the parked second X-carriage
   #define X1_MAX_POS X_BED_SIZE // set maximum to ensure first x-carriage doesn't hit the parked second X-carriage
   #define X2_MIN_POS 80     // set minimum to ensure second x-carriage doesn't hit the parked first X-carriage

Marlin/src/config/examples/Felix/Configuration_adv.h

   #endif
 #endif
 
-// Enable this for dual x-carriage printers.
-// A dual x-carriage design has the advantage that the inactive extruder can be parked which
-// prevents hot-end ooze contaminating the print. It also reduces the weight of each x-carriage
-// allowing faster printing speeds. Connect your X2 stepper to the first unused E plug.
+/**
+ * Dual X Carriage
+ *
+ * This setup has two X carriages that can move independently, each with its own hotend.
+ * The carriages can be used to print an object with two colors or materials, or in
+ * "duplication mode" it can print two identical or X-mirrored objects simultaneously.
+ * The inactive carriage is parked automatically to prevent oozing.
+ * X1 is the left carriage, X2 the right. They park and home at opposite ends of the X axis.
+ * By default the X2 stepper is assigned to the first unused E plug on the board.
+ */
 //#define DUAL_X_CARRIAGE
 #if ENABLED(DUAL_X_CARRIAGE)
-  // Configuration for second X-carriage
-  // Note: the first x-carriage is defined as the x-carriage which homes to the minimum endstop;
-  // the second x-carriage always homes to the maximum endstop.
   #define X1_MIN_POS X_MIN_POS  // set minimum to ensure first x-carriage doesn't hit the parked second X-carriage
   #define X1_MAX_POS X_BED_SIZE // set maximum to ensure first x-carriage doesn't hit the parked second X-carriage
   #define X2_MIN_POS 80     // set minimum to ensure second x-carriage doesn't hit the parked first X-carriage

Marlin/src/config/examples/FolgerTech/i3-2020/Configuration_adv.h

   #endif
 #endif
 
-// Enable this for dual x-carriage printers.
-// A dual x-carriage design has the advantage that the inactive extruder can be parked which
-// prevents hot-end ooze contaminating the print. It also reduces the weight of each x-carriage
-// allowing faster printing speeds. Connect your X2 stepper to the first unused E plug.
+/**
+ * Dual X Carriage
+ *
+ * This setup has two X carriages that can move independently, each with its own hotend.
+ * The carriages can be used to print an object with two colors or materials, or in
+ * "duplication mode" it can print two identical or X-mirrored objects simultaneously.
+ * The inactive carriage is parked automatically to prevent oozing.
+ * X1 is the left carriage, X2 the right. They park and home at opposite ends of the X axis.
+ * By default the X2 stepper is assigned to the first unused E plug on the board.
+ */
 //#define DUAL_X_CARRIAGE
 #if ENABLED(DUAL_X_CARRIAGE)
-  // Configuration for second X-carriage
-  // Note: the first x-carriage is defined as the x-carriage which homes to the minimum endstop;
-  // the second x-carriage always homes to the maximum endstop.
   #define X1_MIN_POS X_MIN_POS  // set minimum to ensure first x-carriage doesn't hit the parked second X-carriage
   #define X1_MAX_POS X_BED_SIZE // set maximum to ensure first x-carriage doesn't hit the parked second X-carriage
   #define X2_MIN_POS 80     // set minimum to ensure second x-carriage doesn't hit the parked first X-carriage

Marlin/src/config/examples/Geeetech/Prusa i3 Pro C/Configuration_adv.h

   #endif
 #endif
 
-// Enable this for dual x-carriage printers.
-// A dual x-carriage design has the advantage that the inactive extruder can be parked which
-// prevents hot-end ooze contaminating the print. It also reduces the weight of each x-carriage
-// allowing faster printing speeds. Connect your X2 stepper to the first unused E plug.
+/**
+ * Dual X Carriage
+ *
+ * This setup has two X carriages that can move independently, each with its own hotend.
+ * The carriages can be used to print an object with two colors or materials, or in
+ * "duplication mode" it can print two identical or X-mirrored objects simultaneously.
+ * The inactive carriage is parked automatically to prevent oozing.
+ * X1 is the left carriage, X2 the right. They park and home at opposite ends of the X axis.
+ * By default the X2 stepper is assigned to the first unused E plug on the board.
+ */
 //#define DUAL_X_CARRIAGE
 #if ENABLED(DUAL_X_CARRIAGE)
-  // Configuration for second X-carriage
-  // Note: the first x-carriage is defined as the x-carriage which homes to the minimum endstop;
-  // the second x-carriage always homes to the maximum endstop.
   #define X1_MIN_POS X_MIN_POS  // set minimum to ensure first x-carriage doesn't hit the parked second X-carriage
   #define X1_MAX_POS X_BED_SIZE // set maximum to ensure first x-carriage doesn't hit the parked second X-carriage
   #define X2_MIN_POS 80     // set minimum to ensure second x-carriage doesn't hit the parked first X-carriage

Marlin/src/config/examples/Geeetech/Prusa i3 Pro W/Configuration_adv.h

   #endif
 #endif
 
-// Enable this for dual x-carriage printers.
-// A dual x-carriage design has the advantage that the inactive extruder can be parked which
-// prevents hot-end ooze contaminating the print. It also reduces the weight of each x-carriage
-// allowing faster printing speeds. Connect your X2 stepper to the first unused E plug.
+/**
+ * Dual X Carriage
+ *
+ * This setup has two X carriages that can move independently, each with its own hotend.
+ * The carriages can be used to print an object with two colors or materials, or in
+ * "duplication mode" it can print two identical or X-mirrored objects simultaneously.
+ * The inactive carriage is parked automatically to prevent oozing.
+ * X1 is the left carriage, X2 the right. They park and home at opposite ends of the X axis.
+ * By default the X2 stepper is assigned to the first unused E plug on the board.
+ */
 //#define DUAL_X_CARRIAGE
 #if ENABLED(DUAL_X_CARRIAGE)
-  // Configuration for second X-carriage
-  // Note: the first x-carriage is defined as the x-carriage which homes to the minimum endstop;
-  // the second x-carriage always homes to the maximum endstop.
   #define X1_MIN_POS X_MIN_POS  // set minimum to ensure first x-carriage doesn't hit the parked second X-carriage
   #define X1_MAX_POS X_BED_SIZE // set maximum to ensure first x-carriage doesn't hit the parked second X-carriage
   #define X2_MIN_POS 80     // set minimum to ensure second x-carriage doesn't hit the parked first X-carriage

Marlin/src/config/examples/Infitary/i3-M508/Configuration_adv.h

   #endif
 #endif
 
-// Enable this for dual x-carriage printers.
-// A dual x-carriage design has the advantage that the inactive extruder can be parked which
-// prevents hot-end ooze contaminating the print. It also reduces the weight of each x-carriage
-// allowing faster printing speeds. Connect your X2 stepper to the first unused E plug.
+/**
+ * Dual X Carriage
+ *
+ * This setup has two X carriages that can move independently, each with its own hotend.
+ * The carriages can be used to print an object with two colors or materials, or in
+ * "duplication mode" it can print two identical or X-mirrored objects simultaneously.
+ * The inactive carriage is parked automatically to prevent oozing.
+ * X1 is the left carriage, X2 the right. They park and home at opposite ends of the X axis.
+ * By default the X2 stepper is assigned to the first unused E plug on the board.
+ */
 //#define DUAL_X_CARRIAGE
 #if ENABLED(DUAL_X_CARRIAGE)
-  // Configuration for second X-carriage
-  // Note: the first x-carriage is defined as the x-carriage which homes to the minimum endstop;
-  // the second x-carriage always homes to the maximum endstop.
   #define X1_MIN_POS X_MIN_POS  // set minimum to ensure first x-carriage doesn't hit the parked second X-carriage
   #define X1_MAX_POS X_BED_SIZE // set maximum to ensure first x-carriage doesn't hit the parked second X-carriage
   #define X2_MIN_POS 80     // set minimum to ensure second x-carriage doesn't hit the parked first X-carriage

Marlin/src/config/examples/JGAurora/A5/Configuration_adv.h

   #endif
 #endif
 
-// Enable this for dual x-carriage printers.
-// A dual x-carriage design has the advantage that the inactive extruder can be parked which
-// prevents hot-end ooze contaminating the print. It also reduces the weight of each x-carriage
-// allowing faster printing speeds. Connect your X2 stepper to the first unused E plug.
+/**
+ * Dual X Carriage
+ *
+ * This setup has two X carriages that can move independently, each with its own hotend.
+ * The carriages can be used to print an object with two colors or materials, or in
+ * "duplication mode" it can print two identical or X-mirrored objects simultaneously.
+ * The inactive carriage is parked automatically to prevent oozing.
+ * X1 is the left carriage, X2 the right. They park and home at opposite ends of the X axis.
+ * By default the X2 stepper is assigned to the first unused E plug on the board.
+ */
 //#define DUAL_X_CARRIAGE
 #if ENABLED(DUAL_X_CARRIAGE)
-  // Configuration for second X-carriage
-  // Note: the first x-carriage is defined as the x-carriage which homes to the minimum endstop;
-  // the second x-carriage always homes to the maximum endstop.
   #define X1_MIN_POS X_MIN_POS  // set minimum to ensure first x-carriage doesn't hit the parked second X-carriage
   #define X1_MAX_POS X_BED_SIZE // set maximum to ensure first x-carriage doesn't hit the parked second X-carriage
   #define X2_MIN_POS 80     // set minimum to ensure second x-carriage doesn't hit the parked first X-carriage

Marlin/src/config/examples/MakerParts/Configuration_adv.h

   #endif
 #endif
 
-// Enable this for dual x-carriage printers.
-// A dual x-carriage design has the advantage that the inactive extruder can be parked which
-// prevents hot-end ooze contaminating the print. It also reduces the weight of each x-carriage
-// allowing faster printing speeds. Connect your X2 stepper to the first unused E plug.
+/**
+ * Dual X Carriage
+ *
+ * This setup has two X carriages that can move independently, each with its own hotend.
+ * The carriages can be used to print an object with two colors or materials, or in
+ * "duplication mode" it can print two identical or X-mirrored objects simultaneously.
+ * The inactive carriage is parked automatically to prevent oozing.
+ * X1 is the left carriage, X2 the right. They park and home at opposite ends of the X axis.
+ * By default the X2 stepper is assigned to the first unused E plug on the board.
+ */
 //#define DUAL_X_CARRIAGE
 #if ENABLED(DUAL_X_CARRIAGE)
-  // Configuration for second X-carriage
-  // Note: the first x-carriage is defined as the x-carriage which homes to the minimum endstop;
-  // the second x-carriage always homes to the maximum endstop.
   #define X1_MIN_POS X_MIN_POS  // set minimum to ensure first x-carriage doesn't hit the parked second X-carriage
   #define X1_MAX_POS X_BED_SIZE // set maximum to ensure first x-carriage doesn't hit the parked second X-carriage
   #define X2_MIN_POS 80     // set minimum to ensure second x-carriage doesn't hit the parked first X-carriage

Marlin/src/config/examples/Malyan/M150/Configuration_adv.h

   #endif
 #endif
 
-// Enable this for dual x-carriage printers.
-// A dual x-carriage design has the advantage that the inactive extruder can be parked which
-// prevents hot-end ooze contaminating the print. It also reduces the weight of each x-carriage
-// allowing faster printing speeds. Connect your X2 stepper to the first unused E plug.
+/**
+ * Dual X Carriage
+ *
+ * This setup has two X carriages that can move independently, each with its own hotend.
+ * The carriages can be used to print an object with two colors or materials, or in
+ * "duplication mode" it can print two identical or X-mirrored objects simultaneously.
+ * The inactive carriage is parked automatically to prevent oozing.
+ * X1 is the left carriage, X2 the right. They park and home at opposite ends of the X axis.
+ * By default the X2 stepper is assigned to the first unused E plug on the board.
+ */
 //#define DUAL_X_CARRIAGE
 #if ENABLED(DUAL_X_CARRIAGE)
-  // Configuration for second X-carriage
-  // Note: the first x-carriage is defined as the x-carriage which homes to the minimum endstop;
-  // the second x-carriage always homes to the maximum endstop.
   #define X1_MIN_POS X_MIN_POS  // set minimum to ensure first x-carriage doesn't hit the parked second X-carriage
   #define X1_MAX_POS X_BED_SIZE // set maximum to ensure first x-carriage doesn't hit the parked second X-carriage
   #define X2_MIN_POS 80     // set minimum to ensure second x-carriage doesn't hit the parked first X-carriage

Marlin/src/config/examples/Malyan/M200/Configuration_adv.h

   #endif
 #endif
 
-// Enable this for dual x-carriage printers.
-// A dual x-carriage design has the advantage that the inactive extruder can be parked which
-// prevents hot-end ooze contaminating the print. It also reduces the weight of each x-carriage
-// allowing faster printing speeds. Connect your X2 stepper to the first unused E plug.
+/**
+ * Dual X Carriage
+ *
+ * This setup has two X carriages that can move independently, each with its own hotend.
+ * The carriages can be used to print an object with two colors or materials, or in
+ * "duplication mode" it can print two identical or X-mirrored objects simultaneously.
+ * The inactive carriage is parked automatically to prevent oozing.
+ * X1 is the left carriage, X2 the right. They park and home at opposite ends of the X axis.
+ * By default the X2 stepper is assigned to the first unused E plug on the board.
+ */
 //#define DUAL_X_CARRIAGE
 #if ENABLED(DUAL_X_CARRIAGE)
-  // Configuration for second X-carriage
-  // Note: the first x-carriage is defined as the x-carriage which homes to the minimum endstop;
-  // the second x-carriage always homes to the maximum endstop.
   #define X1_MIN_POS X_MIN_POS  // set minimum to ensure first x-carriage doesn't hit the parked second X-carriage
   #define X1_MAX_POS X_BED_SIZE // set maximum to ensure first x-carriage doesn't hit the parked second X-carriage
   #define X2_MIN_POS 80     // set minimum to ensure second x-carriage doesn't hit the parked first X-carriage

Marlin/src/config/examples/Micromake/C1/enhanced/Configuration_adv.h

   #endif
 #endif
 
-// Enable this for dual x-carriage printers.
-// A dual x-carriage design has the advantage that the inactive extruder can be parked which
-// prevents hot-end ooze contaminating the print. It also reduces the weight of each x-carriage
-// allowing faster printing speeds. Connect your X2 stepper to the first unused E plug.
+/**
+ * Dual X Carriage
+ *
+ * This setup has two X carriages that can move independently, each with its own hotend.
+ * The carriages can be used to print an object with two colors or materials, or in
+ * "duplication mode" it can print two identical or X-mirrored objects simultaneously.
+ * The inactive carriage is parked automatically to prevent oozing.
+ * X1 is the left carriage, X2 the right. They park and home at opposite ends of the X axis.
+ * By default the X2 stepper is assigned to the first unused E plug on the board.
+ */
 //#define DUAL_X_CARRIAGE
 #if ENABLED(DUAL_X_CARRIAGE)
-  // Configuration for second X-carriage
-  // Note: the first x-carriage is defined as the x-carriage which homes to the minimum endstop;
-  // the second x-carriage always homes to the maximum endstop.
   #define X1_MIN_POS X_MIN_POS  // set minimum to ensure first x-carriage doesn't hit the parked second X-carriage
   #define X1_MAX_POS X_BED_SIZE // set maximum to ensure first x-carriage doesn't hit the parked second X-carriage
   #define X2_MIN_POS 80     // set minimum to ensure second x-carriage doesn't hit the parked first X-carriage

Marlin/src/config/examples/Mks/Sbase/Configuration_adv.h

   #endif
 #endif
 
-// Enable this for dual x-carriage printers.
-// A dual x-carriage design has the advantage that the inactive extruder can be parked which
-// prevents hot-end ooze contaminating the print. It also reduces the weight of each x-carriage
-// allowing faster printing speeds. Connect your X2 stepper to the first unused E plug.
+/**
+ * Dual X Carriage
+ *
+ * This setup has two X carriages that can move independently, each with its own hotend.
+ * The carriages can be used to print an object with two colors or materials, or in
+ * "duplication mode" it can print two identical or X-mirrored objects simultaneously.
+ * The inactive carriage is parked automatically to prevent oozing.
+ * X1 is the left carriage, X2 the right. They park and home at opposite ends of the X axis.
+ * By default the X2 stepper is assigned to the first unused E plug on the board.
+ */
 //#define DUAL_X_CARRIAGE
 #if ENABLED(DUAL_X_CARRIAGE)
-  // Configuration for second X-carriage
-  // Note: the first x-carriage is defined as the x-carriage which homes to the minimum endstop;
-  // the second x-carriage always homes to the maximum endstop.
   #define X1_MIN_POS X_MIN_POS  // set minimum to ensure first x-carriage doesn't hit the parked second X-carriage
   #define X1_MAX_POS X_BED_SIZE // set maximum to ensure first x-carriage doesn't hit the parked second X-carriage
   #define X2_MIN_POS 80     // set minimum to ensure second x-carriage doesn't hit the parked first X-carriage

Marlin/src/config/examples/RigidBot/Configuration_adv.h

   #endif
 #endif
 
-// Enable this for dual x-carriage printers.
-// A dual x-carriage design has the advantage that the inactive extruder can be parked which
-// prevents hot-end ooze contaminating the print. It also reduces the weight of each x-carriage
-// allowing faster printing speeds. Connect your X2 stepper to the first unused E plug.
+/**
+ * Dual X Carriage
+ *
+ * This setup has two X carriages that can move independently, each with its own hotend.
+ * The carriages can be used to print an object with two colors or materials, or in
+ * "duplication mode" it can print two identical or X-mirrored objects simultaneously.
+ * The inactive carriage is parked automatically to prevent oozing.
+ * X1 is the left carriage, X2 the right. They park and home at opposite ends of the X axis.
+ * By default the X2 stepper is assigned to the first unused E plug on the board.
+ */
 //#define DUAL_X_CARRIAGE
 #if ENABLED(DUAL_X_CARRIAGE)
-  // Configuration for second X-carriage
-  // Note: the first x-carriage is defined as the x-carriage which homes to the minimum endstop;
-  // the second x-carriage always homes to the maximum endstop.
   #define X1_MIN_POS X_MIN_POS  // set minimum to ensure first x-carriage doesn't hit the parked second X-carriage
   #define X1_MAX_POS X_BED_SIZE // set maximum to ensure first x-carriage doesn't hit the parked second X-carriage
   #define X2_MIN_POS 80     // set minimum to ensure second x-carriage doesn't hit the parked first X-carriage

Marlin/src/config/examples/SCARA/Configuration_adv.h

   #endif
 #endif
 
-// Enable this for dual x-carriage printers.
-// A dual x-carriage design has the advantage that the inactive extruder can be parked which
-// prevents hot-end ooze contaminating the print. It also reduces the weight of each x-carriage
-// allowing faster printing speeds. Connect your X2 stepper to the first unused E plug.
+/**
+ * Dual X Carriage
+ *
+ * This setup has two X carriages that can move independently, each with its own hotend.
+ * The carriages can be used to print an object with two colors or materials, or in
+ * "duplication mode" it can print two identical or X-mirrored objects simultaneously.
+ * The inactive carriage is parked automatically to prevent oozing.
+ * X1 is the left carriage, X2 the right. They park and home at opposite ends of the X axis.
+ * By default the X2 stepper is assigned to the first unused E plug on the board.
+ */
 //#define DUAL_X_CARRIAGE
 #if ENABLED(DUAL_X_CARRIAGE)
-  // Configuration for second X-carriage
-  // Note: the first x-carriage is defined as the x-carriage which homes to the minimum endstop;
-  // the second x-carriage always homes to the maximum endstop.
   #define X1_MIN_POS X_MIN_POS  // set minimum to ensure first x-carriage doesn't hit the parked second X-carriage
   #define X1_MAX_POS X_BED_SIZE // set maximum to ensure first x-carriage doesn't hit the parked second X-carriage
   #define X2_MIN_POS 80     // set minimum to ensure second x-carriage doesn't hit the parked first X-carriage

Marlin/src/config/examples/Sanguinololu/Configuration_adv.h

   #endif
 #endif
 
-// Enable this for dual x-carriage printers.
-// A dual x-carriage design has the advantage that the inactive extruder can be parked which
-// prevents hot-end ooze contaminating the print. It also reduces the weight of each x-carriage
-// allowing faster printing speeds. Connect your X2 stepper to the first unused E plug.
+/**
+ * Dual X Carriage
+ *
+ * This setup has two X carriages that can move independently, each with its own hotend.
+ * The carriages can be used to print an object with two colors or materials, or in
+ * "duplication mode" it can print two identical or X-mirrored objects simultaneously.
+ * The inactive carriage is parked automatically to prevent oozing.
+ * X1 is the left carriage, X2 the right. They park and home at opposite ends of the X axis.
+ * By default the X2 stepper is assigned to the first unused E plug on the board.
+ */
 //#define DUAL_X_CARRIAGE
 #if ENABLED(DUAL_X_CARRIAGE)
-  // Configuration for second X-carriage
-  // Note: the first x-carriage is defined as the x-carriage which homes to the minimum endstop;
-  // the second x-carriage always homes to the maximum endstop.
   #define X1_MIN_POS X_MIN_POS  // set minimum to ensure first x-carriage doesn't hit the parked second X-carriage
   #define X1_MAX_POS X_BED_SIZE // set maximum to ensure first x-carriage doesn't hit the parked second X-carriage
   #define X2_MIN_POS 80     // set minimum to ensure second x-carriage doesn't hit the parked first X-carriage

Marlin/src/config/examples/TheBorg/Configuration_adv.h

   #endif
 #endif
 
-// Enable this for dual x-carriage printers.
-// A dual x-carriage design has the advantage that the inactive extruder can be parked which
-// prevents hot-end ooze contaminating the print. It also reduces the weight of each x-carriage
-// allowing faster printing speeds. Connect your X2 stepper to the first unused E plug.
+/**
+ * Dual X Carriage
+ *
+ * This setup has two X carriages that can move independently, each with its own hotend.
+ * The carriages can be used to print an object with two colors or materials, or in
+ * "duplication mode" it can print two identical or X-mirrored objects simultaneously.
+ * The inactive carriage is parked automatically to prevent oozing.
+ * X1 is the left carriage, X2 the right. They park and home at opposite ends of the X axis.
+ * By default the X2 stepper is assigned to the first unused E plug on the board.
+ */
 //#define DUAL_X_CARRIAGE
 #if ENABLED(DUAL_X_CARRIAGE)
-  // Configuration for second X-carriage
-  // Note: the first x-carriage is defined as the x-carriage which homes to the minimum endstop;
-  // the second x-carriage always homes to the maximum endstop.
   #define X1_MIN_POS X_MIN_POS  // set minimum to ensure first x-carriage doesn't hit the parked second X-carriage
   #define X1_MAX_POS X_BED_SIZE // set maximum to ensure first x-carriage doesn't hit the parked second X-carriage
   #define X2_MIN_POS 80     // set minimum to ensure second x-carriage doesn't hit the parked first X-carriage

Marlin/src/config/examples/TinyBoy2/Configuration_adv.h

   #endif
 #endif
 
-// Enable this for dual x-carriage printers.
-// A dual x-carriage design has the advantage that the inactive extruder can be parked which
-// prevents hot-end ooze contaminating the print. It also reduces the weight of each x-carriage
-// allowing faster printing speeds. Connect your X2 stepper to the first unused E plug.
+/**
+ * Dual X Carriage
+ *
+ * This setup has two X carriages that can move independently, each with its own hotend.
+ * The carriages can be used to print an object with two colors or materials, or in
+ * "duplication mode" it can print two identical or X-mirrored objects simultaneously.
+ * The inactive carriage is parked automatically to prevent oozing.
+ * X1 is the left carriage, X2 the right. They park and home at opposite ends of the X axis.
+ * By default the X2 stepper is assigned to the first unused E plug on the board.
+ */
 //#define DUAL_X_CARRIAGE
 #if ENABLED(DUAL_X_CARRIAGE)
-  // Configuration for second X-carriage
-  // Note: the first x-carriage is defined as the x-carriage which homes to the minimum endstop;
-  // the second x-carriage always homes to the maximum endstop.
   #define X1_MIN_POS X_MIN_POS  // set minimum to ensure first x-carriage doesn't hit the parked second X-carriage
   #define X1_MAX_POS X_BED_SIZE // set maximum to ensure first x-carriage doesn't hit the parked second X-carriage
   #define X2_MIN_POS 80     // set minimum to ensure second x-carriage doesn't hit the parked first X-carriage

Marlin/src/config/examples/Tronxy/X3A/Configuration_adv.h

   #endif
 #endif
 
-// Enable this for dual x-carriage printers.
-// A dual x-carriage design has the advantage that the inactive extruder can be parked which
-// prevents hot-end ooze contaminating the print. It also reduces the weight of each x-carriage
-// allowing faster printing speeds. Connect your X2 stepper to the first unused E plug.
+/**
+ * Dual X Carriage
+ *
+ * This setup has two X carriages that can move independently, each with its own hotend.
+ * The carriages can be used to print an object with two colors or materials, or in
+ * "duplication mode" it can print two identical or X-mirrored objects simultaneously.
+ * The inactive carriage is parked automatically to prevent oozing.
+ * X1 is the left carriage, X2 the right. They park and home at opposite ends of the X axis.
+ * By default the X2 stepper is assigned to the first unused E plug on the board.
+ */
 //#define DUAL_X_CARRIAGE
 #if ENABLED(DUAL_X_CARRIAGE)
-  // Configuration for second X-carriage
-  // Note: the first x-carriage is defined as the x-carriage which homes to the minimum endstop;
-  // the second x-carriage always homes to the maximum endstop.
   #define X1_MIN_POS X_MIN_POS  // set minimum to ensure first x-carriage doesn't hit the parked second X-carriage
   #define X1_MAX_POS X_BED_SIZE // set maximum to ensure first x-carriage doesn't hit the parked second X-carriage
   #define X2_MIN_POS 80     // set minimum to ensure second x-carriage doesn't hit the parked first X-carriage

Marlin/src/config/examples/UltiMachine/Archim2/Configuration_adv.h

   #endif
 #endif
 
-// Enable this for dual x-carriage printers.
-// A dual x-carriage design has the advantage that the inactive extruder can be parked which
-// prevents hot-end ooze contaminating the print. It also reduces the weight of each x-carriage
-// allowing faster printing speeds. Connect your X2 stepper to the first unused E plug.
+/**
+ * Dual X Carriage
+ *
+ * This setup has two X carriages that can move independently, each with its own hotend.
+ * The carriages can be used to print an object with two colors or materials, or in
+ * "duplication mode" it can print two identical or X-mirrored objects simultaneously.
+ * The inactive carriage is parked automatically to prevent oozing.
+ * X1 is the left carriage, X2 the right. They park and home at opposite ends of the X axis.
+ * By default the X2 stepper is assigned to the first unused E plug on the board.
+ */
 //#define DUAL_X_CARRIAGE
 #if ENABLED(DUAL_X_CARRIAGE)
-  // Configuration for second X-carriage
-  // Note: the first x-carriage is defined as the x-carriage which homes to the minimum endstop;
-  // the second x-carriage always homes to the maximum endstop.
   #define X1_MIN_POS X_MIN_POS  // set minimum to ensure first x-carriage doesn't hit the parked second X-carriage
   #define X1_MAX_POS X_BED_SIZE // set maximum to ensure first x-carriage doesn't hit the parked second X-carriage
   #define X2_MIN_POS 80     // set minimum to ensure second x-carriage doesn't hit the parked first X-carriage

Marlin/src/config/examples/Velleman/K8200/Configuration_adv.h

   #endif
 #endif
 
-// Enable this for dual x-carriage printers.
-// A dual x-carriage design has the advantage that the inactive extruder can be parked which
-// prevents hot-end ooze contaminating the print. It also reduces the weight of each x-carriage
-// allowing faster printing speeds. Connect your X2 stepper to the first unused E plug.
+/**
+ * Dual X Carriage
+ *
+ * This setup has two X carriages that can move independently, each with its own hotend.
+ * The carriages can be used to print an object with two colors or materials, or in
+ * "duplication mode" it can print two identical or X-mirrored objects simultaneously.
+ * The inactive carriage is parked automatically to prevent oozing.
+ * X1 is the left carriage, X2 the right. They park and home at opposite ends of the X axis.
+ * By default the X2 stepper is assigned to the first unused E plug on the board.
+ */
 //#define DUAL_X_CARRIAGE
 #if ENABLED(DUAL_X_CARRIAGE)
-  // Configuration for second X-carriage
-  // Note: the first x-carriage is defined as the x-carriage which homes to the minimum endstop;
-  // the second x-carriage always homes to the maximum endstop.
   #define X1_MIN_POS X_MIN_POS  // set minimum to ensure first x-carriage doesn't hit the parked second X-carriage
   #define X1_MAX_POS X_BED_SIZE // set maximum to ensure first x-carriage doesn't hit the parked second X-carriage
   #define X2_MIN_POS 80     // set minimum to ensure second x-carriage doesn't hit the parked first X-carriage

Marlin/src/config/examples/Velleman/K8400/Configuration_adv.h

   #endif
 #endif
 
-// Enable this for dual x-carriage printers.
-// A dual x-carriage design has the advantage that the inactive extruder can be parked which
-// prevents hot-end ooze contaminating the print. It also reduces the weight of each x-carriage
-// allowing faster printing speeds. Connect your X2 stepper to the first unused E plug.
+/**
+ * Dual X Carriage
+ *
+ * This setup has two X carriages that can move independently, each with its own hotend.
+ * The carriages can be used to print an object with two colors or materials, or in
+ * "duplication mode" it can print two identical or X-mirrored objects simultaneously.
+ * The inactive carriage is parked automatically to prevent oozing.
+ * X1 is the left carriage, X2 the right. They park and home at opposite ends of the X axis.
+ * By default the X2 stepper is assigned to the first unused E plug on the board.
+ */
 //#define DUAL_X_CARRIAGE
 #if ENABLED(DUAL_X_CARRIAGE)
-  // Configuration for second X-carriage
-  // Note: the first x-carriage is defined as the x-carriage which homes to the minimum endstop;
-  // the second x-carriage always homes to the maximum endstop.
   #define X1_MIN_POS X_MIN_POS  // set minimum to ensure first x-carriage doesn't hit the parked second X-carriage
   #define X1_MAX_POS X_BED_SIZE // set maximum to ensure first x-carriage doesn't hit the parked second X-carriage
   #define X2_MIN_POS 80     // set minimum to ensure second x-carriage doesn't hit the parked first X-carriage

Marlin/src/config/examples/Wanhao/Duplicator 6/Configuration_adv.h

   #endif
 #endif
 
-// Enable this for dual x-carriage printers.
-// A dual x-carriage design has the advantage that the inactive extruder can be parked which
-// prevents hot-end ooze contaminating the print. It also reduces the weight of each x-carriage
-// allowing faster printing speeds. Connect your X2 stepper to the first unused E plug.
+/**
+ * Dual X Carriage
+ *
+ * This setup has two X carriages that can move independently, each with its own hotend.
+ * The carriages can be used to print an object with two colors or materials, or in
+ * "duplication mode" it can print two identical or X-mirrored objects simultaneously.
+ * The inactive carriage is parked automatically to prevent oozing.
+ * X1 is the left carriage, X2 the right. They park and home at opposite ends of the X axis.
+ * By default the X2 stepper is assigned to the first unused E plug on the board.
+ */
 //#define DUAL_X_CARRIAGE
 #if ENABLED(DUAL_X_CARRIAGE)
-  // Configuration for second X-carriage
-  // Note: the first x-carriage is defined as the x-carriage which homes to the minimum endstop;
-  // the second x-carriage always homes to the maximum endstop.
   #define X1_MIN_POS X_MIN_POS  // set minimum to ensure first x-carriage doesn't hit the parked second X-carriage
   #define X1_MAX_POS X_BED_SIZE // set maximum to ensure first x-carriage doesn't hit the parked second X-carriage
   #define X2_MIN_POS 80     // set minimum to ensure second x-carriage doesn't hit the parked first X-carriage

Marlin/src/config/examples/delta/FLSUN/auto_calibrate/Configuration_adv.h

   #endif
 #endif
 
-// Enable this for dual x-carriage printers.
-// A dual x-carriage design has the advantage that the inactive extruder can be parked which
-// prevents hot-end ooze contaminating the print. It also reduces the weight of each x-carriage
-// allowing faster printing speeds. Connect your X2 stepper to the first unused E plug.
+/**
+ * Dual X Carriage
+ *
+ * This setup has two X carriages that can move independently, each with its own hotend.
+ * The carriages can be used to print an object with two colors or materials, or in
+ * "duplication mode" it can print two identical or X-mirrored objects simultaneously.
+ * The inactive carriage is parked automatically to prevent oozing.
+ * X1 is the left carriage, X2 the right. They park and home at opposite ends of the X axis.
+ * By default the X2 stepper is assigned to the first unused E plug on the board.
+ */
 //#define DUAL_X_CARRIAGE
 #if ENABLED(DUAL_X_CARRIAGE)
-  // Configuration for second X-carriage
-  // Note: the first x-carriage is defined as the x-carriage which homes to the minimum endstop;
-  // the second x-carriage always homes to the maximum endstop.
   #define X1_MIN_POS X_MIN_POS  // set minimum to ensure first x-carriage doesn't hit the parked second X-carriage
   #define X1_MAX_POS X_BED_SIZE // set maximum to ensure first x-carriage doesn't hit the parked second X-carriage
   #define X2_MIN_POS 80     // set minimum to ensure second x-carriage doesn't hit the parked first X-carriage

Marlin/src/config/examples/delta/FLSUN/kossel/Configuration_adv.h

   #endif
 #endif
 
-// Enable this for dual x-carriage printers.
-// A dual x-carriage design has the advantage that the inactive extruder can be parked which
-// prevents hot-end ooze contaminating the print. It also reduces the weight of each x-carriage
-// allowing faster printing speeds. Connect your X2 stepper to the first unused E plug.
+/**
+ * Dual X Carriage
+ *
+ * This setup has two X carriages that can move independently, each with its own hotend.
+ * The carriages can be used to print an object with two colors or materials, or in
+ * "duplication mode" it can print two identical or X-mirrored objects simultaneously.
+ * The inactive carriage is parked automatically to prevent oozing.
+ * X1 is the left carriage, X2 the right. They park and home at opposite ends of the X axis.
+ * By default the X2 stepper is assigned to the first unused E plug on the board.
+ */
 //#define DUAL_X_CARRIAGE
 #if ENABLED(DUAL_X_CARRIAGE)
-  // Configuration for second X-carriage
-  // Note: the first x-carriage is defined as the x-carriage which homes to the minimum endstop;
-  // the second x-carriage always homes to the maximum endstop.
   #define X1_MIN_POS X_MIN_POS  // set minimum to ensure first x-carriage doesn't hit the parked second X-carriage
   #define X1_MAX_POS X_BED_SIZE // set maximum to ensure first x-carriage doesn't hit the parked second X-carriage
   #define X2_MIN_POS 80     // set minimum to ensure second x-carriage doesn't hit the parked first X-carriage

Marlin/src/config/examples/delta/FLSUN/kossel_mini/Configuration_adv.h

   #endif
 #endif
 
-// Enable this for dual x-carriage printers.
-// A dual x-carriage design has the advantage that the inactive extruder can be parked which
-// prevents hot-end ooze contaminating the print. It also reduces the weight of each x-carriage
-// allowing faster printing speeds. Connect your X2 stepper to the first unused E plug.
+/**
+ * Dual X Carriage
+ *
+ * This setup has two X carriages that can move independently, each with its own hotend.
+ * The carriages can be used to print an object with two colors or materials, or in
+ * "duplication mode" it can print two identical or X-mirrored objects simultaneously.
+ * The inactive carriage is parked automatically to prevent oozing.
+ * X1 is the left carriage, X2 the right. They park and home at opposite ends of the X axis.
+ * By default the X2 stepper is assigned to the first unused E plug on the board.
+ */
 //#define DUAL_X_CARRIAGE
 #if ENABLED(DUAL_X_CARRIAGE)
-  // Configuration for second X-carriage
-  // Note: the first x-carriage is defined as the x-carriage which homes to the minimum endstop;
-  // the second x-carriage always homes to the maximum endstop.
   #define X1_MIN_POS X_MIN_POS  // set minimum to ensure first x-carriage doesn't hit the parked second X-carriage
   #define X1_MAX_POS X_BED_SIZE // set maximum to ensure first x-carriage doesn't hit the parked second X-carriage
   #define X2_MIN_POS 80     // set minimum to ensure second x-carriage doesn't hit the parked first X-carriage

Marlin/src/config/examples/delta/generic/Configuration_adv.h

   #endif
 #endif
 
-// Enable this for dual x-carriage printers.
-// A dual x-carriage design has the advantage that the inactive extruder can be parked which
-// prevents hot-end ooze contaminating the print. It also reduces the weight of each x-carriage
-// allowing faster printing speeds. Connect your X2 stepper to the first unused E plug.
+/**
+ * Dual X Carriage
+ *
+ * This setup has two X carriages that can move independently, each with its own hotend.
+ * The carriages can be used to print an object with two colors or materials, or in
+ * "duplication mode" it can print two identical or X-mirrored objects simultaneously.
+ * The inactive carriage is parked automatically to prevent oozing.
+ * X1 is the left carriage, X2 the right. They park and home at opposite ends of the X axis.
+ * By default the X2 stepper is assigned to the first unused E plug on the board.
+ */
 //#define DUAL_X_CARRIAGE
 #if ENABLED(DUAL_X_CARRIAGE)
-  // Configuration for second X-carriage
-  // Note: the first x-carriage is defined as the x-carriage which homes to the minimum endstop;
-  // the second x-carriage always homes to the maximum endstop.
   #define X1_MIN_POS X_MIN_POS  // set minimum to ensure first x-carriage doesn't hit the parked second X-carriage
   #define X1_MAX_POS X_BED_SIZE // set maximum to ensure first x-carriage doesn't hit the parked second X-carriage
   #define X2_MIN_POS 80     // set minimum to ensure second x-carriage doesn't hit the parked first X-carriage

Marlin/src/config/examples/delta/kossel_mini/Configuration_adv.h

   #endif
 #endif
 
-// Enable this for dual x-carriage printers.
-// A dual x-carriage design has the advantage that the inactive extruder can be parked which
-// prevents hot-end ooze contaminating the print. It also reduces the weight of each x-carriage
-// allowing faster printing speeds. Connect your X2 stepper to the first unused E plug.
+/**
+ * Dual X Carriage
+ *
+ * This setup has two X carriages that can move independently, each with its own hotend.
+ * The carriages can be used to print an object with two colors or materials, or in
+ * "duplication mode" it can print two identical or X-mirrored objects simultaneously.
+ * The inactive carriage is parked automatically to prevent oozing.
+ * X1 is the left carriage, X2 the right. They park and home at opposite ends of the X axis.
+ * By default the X2 stepper is assigned to the first unused E plug on the board.
+ */
 //#define DUAL_X_CARRIAGE
 #if ENABLED(DUAL_X_CARRIAGE)
-  // Configuration for second X-carriage
-  // Note: the first x-carriage is defined as the x-carriage which homes to the minimum endstop;
-  // the second x-carriage always homes to the maximum endstop.
   #define X1_MIN_POS X_MIN_POS  // set minimum to ensure first x-carriage doesn't hit the parked second X-carriage
   #define X1_MAX_POS X_BED_SIZE // set maximum to ensure first x-carriage doesn't hit the parked second X-carriage
   #define X2_MIN_POS 80     // set minimum to ensure second x-carriage doesn't hit the parked first X-carriage

Marlin/src/config/examples/delta/kossel_pro/Configuration_adv.h

   #endif
 #endif
 
-// Enable this for dual x-carriage printers.
-// A dual x-carriage design has the advantage that the inactive extruder can be parked which
-// prevents hot-end ooze contaminating the print. It also reduces the weight of each x-carriage
-// allowing faster printing speeds. Connect your X2 stepper to the first unused E plug.
+/**
+ * Dual X Carriage
+ *
+ * This setup has two X carriages that can move independently, each with its own hotend.
+ * The carriages can be used to print an object with two colors or materials, or in
+ * "duplication mode" it can print two identical or X-mirrored objects simultaneously.
+ * The inactive carriage is parked automatically to prevent oozing.
+ * X1 is the left carriage, X2 the right. They park and home at opposite ends of the X axis.
+ * By default the X2 stepper is assigned to the first unused E plug on the board.
+ */
 //#define DUAL_X_CARRIAGE
 #if ENABLED(DUAL_X_CARRIAGE)
-  // Configuration for second X-carriage
-  // Note: the first x-carriage is defined as the x-carriage which homes to the minimum endstop;
-  // the second x-carriage always homes to the maximum endstop.
   #define X1_MIN_POS X_MIN_POS  // set minimum to ensure first x-carriage doesn't hit the parked second X-carriage
   #define X1_MAX_POS X_BED_SIZE // set maximum to ensure first x-carriage doesn't hit the parked second X-carriage
   #define X2_MIN_POS 80     // set minimum to ensure second x-carriage doesn't hit the parked first X-carriage

Marlin/src/config/examples/delta/kossel_xl/Configuration_adv.h

   #endif
 #endif
 
-// Enable this for dual x-carriage printers.
-// A dual x-carriage design has the advantage that the inactive extruder can be parked which
-// prevents hot-end ooze contaminating the print. It also reduces the weight of each x-carriage
-// allowing faster printing speeds. Connect your X2 stepper to the first unused E plug.
+/**
+ * Dual X Carriage
+ *
+ * This setup has two X carriages that can move independently, each with its own hotend.
+ * The carriages can be used to print an object with two colors or materials, or in
+ * "duplication mode" it can print two identical or X-mirrored objects simultaneously.
+ * The inactive carriage is parked automatically to prevent oozing.
+ * X1 is the left carriage, X2 the right. They park and home at opposite ends of the X axis.
+ * By default the X2 stepper is assigned to the first unused E plug on the board.
+ */
 //#define DUAL_X_CARRIAGE
 #if ENABLED(DUAL_X_CARRIAGE)
-  // Configuration for second X-carriage
-  // Note: the first x-carriage is defined as the x-carriage which homes to the minimum endstop;
-  // the second x-carriage always homes to the maximum endstop.
   #define X1_MIN_POS X_MIN_POS  // set minimum to ensure first x-carriage doesn't hit the parked second X-carriage
   #define X1_MAX_POS X_BED_SIZE // set maximum to ensure first x-carriage doesn't hit the parked second X-carriage
   #define X2_MIN_POS 80     // set minimum to ensure second x-carriage doesn't hit the parked first X-carriage

Marlin/src/config/examples/gCreate/gMax1.5+/Configuration_adv.h

   #endif
 #endif
 
-// Enable this for dual x-carriage printers.
-// A dual x-carriage design has the advantage that the inactive extruder can be parked which
-// prevents hot-end ooze contaminating the print. It also reduces the weight of each x-carriage
-// allowing faster printing speeds. Connect your X2 stepper to the first unused E plug.
+/**
+ * Dual X Carriage
+ *
+ * This setup has two X carriages that can move independently, each with its own hotend.
+ * The carriages can be used to print an object with two colors or materials, or in
+ * "duplication mode" it can print two identical or X-mirrored objects simultaneously.
+ * The inactive carriage is parked automatically to prevent oozing.
+ * X1 is the left carriage, X2 the right. They park and home at opposite ends of the X axis.
+ * By default the X2 stepper is assigned to the first unused E plug on the board.
+ */
 //#define DUAL_X_CARRIAGE
 #if ENABLED(DUAL_X_CARRIAGE)
-  // Configuration for second X-carriage
-  // Note: the first x-carriage is defined as the x-carriage which homes to the minimum endstop;
-  // the second x-carriage always homes to the maximum endstop.
   #define X1_MIN_POS X_MIN_POS  // set minimum to ensure first x-carriage doesn't hit the parked second X-carriage
   #define X1_MAX_POS X_BED_SIZE // set maximum to ensure first x-carriage doesn't hit the parked second X-carriage
   #define X2_MIN_POS 80     // set minimum to ensure second x-carriage doesn't hit the parked first X-carriage

Marlin/src/config/examples/makibox/Configuration_adv.h

   #endif
 #endif
 
-// Enable this for dual x-carriage printers.
-// A dual x-carriage design has the advantage that the inactive extruder can be parked which
-// prevents hot-end ooze contaminating the print. It also reduces the weight of each x-carriage
-// allowing faster printing speeds. Connect your X2 stepper to the first unused E plug.
+/**
+ * Dual X Carriage
+ *
+ * This setup has two X carriages that can move independently, each with its own hotend.
+ * The carriages can be used to print an object with two colors or materials, or in
+ * "duplication mode" it can print two identical or X-mirrored objects simultaneously.
+ * The inactive carriage is parked automatically to prevent oozing.
+ * X1 is the left carriage, X2 the right. They park and home at opposite ends of the X axis.
+ * By default the X2 stepper is assigned to the first unused E plug on the board.
+ */
 //#define DUAL_X_CARRIAGE
 #if ENABLED(DUAL_X_CARRIAGE)
-  // Configuration for second X-carriage
-  // Note: the first x-carriage is defined as the x-carriage which homes to the minimum endstop;
-  // the second x-carriage always homes to the maximum endstop.
   #define X1_MIN_POS X_MIN_POS  // set minimum to ensure first x-carriage doesn't hit the parked second X-carriage
   #define X1_MAX_POS X_BED_SIZE // set maximum to ensure first x-carriage doesn't hit the parked second X-carriage
   #define X2_MIN_POS 80     // set minimum to ensure second x-carriage doesn't hit the parked first X-carriage

Marlin/src/config/examples/tvrrug/Round2/Configuration_adv.h

   #endif
 #endif
 
-// Enable this for dual x-carriage printers.
-// A dual x-carriage design has the advantage that the inactive extruder can be parked which
-// prevents hot-end ooze contaminating the print. It also reduces the weight of each x-carriage
-// allowing faster printing speeds. Connect your X2 stepper to the first unused E plug.
+/**
+ * Dual X Carriage
+ *
+ * This setup has two X carriages that can move independently, each with its own hotend.
+ * The carriages can be used to print an object with two colors or materials, or in
+ * "duplication mode" it can print two identical or X-mirrored objects simultaneously.
+ * The inactive carriage is parked automatically to prevent oozing.
+ * X1 is the left carriage, X2 the right. They park and home at opposite ends of the X axis.
+ * By default the X2 stepper is assigned to the first unused E plug on the board.
+ */
 //#define DUAL_X_CARRIAGE
 #if ENABLED(DUAL_X_CARRIAGE)
-  // Configuration for second X-carriage
-  // Note: the first x-carriage is defined as the x-carriage which homes to the minimum endstop;
-  // the second x-carriage always homes to the maximum endstop.
   #define X1_MIN_POS X_MIN_POS  // set minimum to ensure first x-carriage doesn't hit the parked second X-carriage
   #define X1_MAX_POS X_BED_SIZE // set maximum to ensure first x-carriage doesn't hit the parked second X-carriage
   #define X2_MIN_POS 80     // set minimum to ensure second x-carriage doesn't hit the parked first X-carriage

Marlin/src/config/examples/wt150/Configuration_adv.h

   #endif
 #endif
 
-// Enable this for dual x-carriage printers.
-// A dual x-carriage design has the advantage that the inactive extruder can be parked which
-// prevents hot-end ooze contaminating the print. It also reduces the weight of each x-carriage
-// allowing faster printing speeds. Connect your X2 stepper to the first unused E plug.
+/**
+ * Dual X Carriage
+ *
+ * This setup has two X carriages that can move independently, each with its own hotend.
+ * The carriages can be used to print an object with two colors or materials, or in
+ * "duplication mode" it can print two identical or X-mirrored objects simultaneously.
+ * The inactive carriage is parked automatically to prevent oozing.
+ * X1 is the left carriage, X2 the right. They park and home at opposite ends of the X axis.
+ * By default the X2 stepper is assigned to the first unused E plug on the board.
+ */
 //#define DUAL_X_CARRIAGE
 #if ENABLED(DUAL_X_CARRIAGE)
-  // Configuration for second X-carriage
-  // Note: the first x-carriage is defined as the x-carriage which homes to the minimum endstop;
-  // the second x-carriage always homes to the maximum endstop.
   #define X1_MIN_POS X_MIN_POS  // set minimum to ensure first x-carriage doesn't hit the parked second X-carriage
   #define X1_MAX_POS X_BED_SIZE // set maximum to ensure first x-carriage doesn't hit the parked second X-carriage
   #define X2_MIN_POS 80     // set minimum to ensure second x-carriage doesn't hit the parked first X-carriage