Replace MIN_RETRACT with MIN_AUTORETRACT, MAX_AUTORETRACT

Marlin/Conditionals_post.h

   #endif
 
   /**
+   * Provide a MAX_AUTORETRACT for older configs
+   */
+  #if ENABLED(FWRETRACT) && !defined(MAX_AUTORETRACT)
+    #define MAX_AUTORETRACT 99
+  #endif
+
+  /**
    * MAX_STEP_FREQUENCY differs for TOSHIBA
    */
   #if ENABLED(CONFIG_STEPPERS_TOSHIBA)

Marlin/Configuration_adv.h

  * Use M207 and M208 to define parameters for retract / recover.
  *
  * Use M209 to enable or disable auto-retract.
- * With auto-retract enabled, all G1 E moves over the MIN_RETRACT length
+ * With auto-retract enabled, all G1 E moves within the set range
  * will be converted to firmware-based retract/recover moves.
  *
  * Be sure to turn off auto-retract during filament change.
  */
 //#define FWRETRACT  // ONLY PARTIALLY TESTED
 #if ENABLED(FWRETRACT)
-  #define MIN_RETRACT 0.1                 // A retract/recover of this length or longer can be converted to auto-retract
+  #define MIN_AUTORETRACT 0.1             // When auto-retract is on, convert E moves of this length and over
+  #define MAX_AUTORETRACT 10.0            // Upper limit for auto-retract conversion
   #define RETRACT_LENGTH 3                // Default retract length (positive mm)
   #define RETRACT_LENGTH_SWAP 13          // Default swap retract length (positive mm), for extruder change
   #define RETRACT_FEEDRATE 45             // Default feedrate for retracting (mm/s)

Marlin/Marlin_main.cpp

       if (autoretract_enabled && !(parser.seen('X') || parser.seen('Y') || parser.seen('Z')) && parser.seen('E')) {
         const float echange = destination[E_AXIS] - current_position[E_AXIS];
         // Is this move an attempt to retract or recover?
-        if ((echange < -(MIN_RETRACT) && !retracted[active_extruder]) || (echange > MIN_RETRACT && retracted[active_extruder])) {
+        if (WITHIN(FABS(echange), MIN_AUTORETRACT, MAX_AUTORETRACT) && retracted[active_extruder] == (echange > 0.0)) {
           current_position[E_AXIS] = destination[E_AXIS]; // hide the slicer-generated retract/recover from calculations
           sync_plan_position_e();  // AND from the planner
           retract(!retracted[active_extruder]);

Marlin/SanityCheck.h

   #error "Replace SLED_PIN with SOL1_PIN (applies to both Z_PROBE_SLED and SOLENOID_PROBE)."
 #elif defined(CONTROLLERFAN_PIN)
   #error "CONTROLLERFAN_PIN is now CONTROLLER_FAN_PIN, enabled with USE_CONTROLLER_FAN. Please update your Configuration_adv.h."
+#elif defined(MIN_RETRACT)
+  #error "MIN_RETRACT is now MIN_AUTORETRACT and MAX_AUTORETRACT. Please update your Configuration_adv.h."
 #endif
 
 /**

Marlin/example_configurations/AlephObjects/TAZ4/Configuration_adv.h

  * Use M207 and M208 to define parameters for retract / recover.
  *
  * Use M209 to enable or disable auto-retract.
- * With auto-retract enabled, all G1 E moves over the MIN_RETRACT length
+ * With auto-retract enabled, all G1 E moves within the set range
  * will be converted to firmware-based retract/recover moves.
  *
  * Be sure to turn off auto-retract during filament change.
  */
 //#define FWRETRACT  // ONLY PARTIALLY TESTED
 #if ENABLED(FWRETRACT)
-  #define MIN_RETRACT 0.1                 // A retract/recover of this length or longer can be converted to auto-retract
+  #define MIN_AUTORETRACT 0.1             // When auto-retract is on, convert E moves of this length and over
+  #define MAX_AUTORETRACT 10.0            // Upper limit for auto-retract conversion
   #define RETRACT_LENGTH 3                // Default retract length (positive mm)
   #define RETRACT_LENGTH_SWAP 13          // Default swap retract length (positive mm), for extruder change
   #define RETRACT_FEEDRATE 45             // Default feedrate for retracting (mm/s)

Marlin/example_configurations/Anet/A6/Configuration_adv.h

  * Use M207 and M208 to define parameters for retract / recover.
  *
  * Use M209 to enable or disable auto-retract.
- * With auto-retract enabled, all G1 E moves over the MIN_RETRACT length
+ * With auto-retract enabled, all G1 E moves within the set range
  * will be converted to firmware-based retract/recover moves.
  *
  * Be sure to turn off auto-retract during filament change.
  */
 //#define FWRETRACT  // ONLY PARTIALLY TESTED
 #if ENABLED(FWRETRACT)
-  #define MIN_RETRACT 0.1                 // A retract/recover of this length or longer can be converted to auto-retract
+  #define MIN_AUTORETRACT 0.1             // When auto-retract is on, convert E moves of this length and over
+  #define MAX_AUTORETRACT 10.0            // Upper limit for auto-retract conversion
   #define RETRACT_LENGTH 3                // Default retract length (positive mm)
   #define RETRACT_LENGTH_SWAP 13          // Default swap retract length (positive mm), for extruder change
   #define RETRACT_FEEDRATE 45             // Default feedrate for retracting (mm/s)

Marlin/example_configurations/Anet/A8/Configuration_adv.h

  * Use M207 and M208 to define parameters for retract / recover.
  *
  * Use M209 to enable or disable auto-retract.
- * With auto-retract enabled, all G1 E moves over the MIN_RETRACT length
+ * With auto-retract enabled, all G1 E moves within the set range
  * will be converted to firmware-based retract/recover moves.
  *
  * Be sure to turn off auto-retract during filament change.
  */
 //#define FWRETRACT  // ONLY PARTIALLY TESTED
 #if ENABLED(FWRETRACT)
-  #define MIN_RETRACT 0.1                 // A retract/recover of this length or longer can be converted to auto-retract
+  #define MIN_AUTORETRACT 0.1             // When auto-retract is on, convert E moves of this length and over
+  #define MAX_AUTORETRACT 10.0            // Upper limit for auto-retract conversion
   #define RETRACT_LENGTH 3                // Default retract length (positive mm)
   #define RETRACT_LENGTH_SWAP 13          // Default swap retract length (positive mm), for extruder change
   #define RETRACT_FEEDRATE 45             // Default feedrate for retracting (mm/s)

Marlin/example_configurations/BQ/Hephestos/Configuration_adv.h

  * Use M207 and M208 to define parameters for retract / recover.
  *
  * Use M209 to enable or disable auto-retract.
- * With auto-retract enabled, all G1 E moves over the MIN_RETRACT length
+ * With auto-retract enabled, all G1 E moves within the set range
  * will be converted to firmware-based retract/recover moves.
  *
  * Be sure to turn off auto-retract during filament change.
  */
 //#define FWRETRACT  // ONLY PARTIALLY TESTED
 #if ENABLED(FWRETRACT)
-  #define MIN_RETRACT 0.1                 // A retract/recover of this length or longer can be converted to auto-retract
+  #define MIN_AUTORETRACT 0.1             // When auto-retract is on, convert E moves of this length and over
+  #define MAX_AUTORETRACT 10.0            // Upper limit for auto-retract conversion
   #define RETRACT_LENGTH 3                // Default retract length (positive mm)
   #define RETRACT_LENGTH_SWAP 13          // Default swap retract length (positive mm), for extruder change
   #define RETRACT_FEEDRATE 45             // Default feedrate for retracting (mm/s)

Marlin/example_configurations/BQ/Hephestos_2/Configuration_adv.h

  * Use M207 and M208 to define parameters for retract / recover.
  *
  * Use M209 to enable or disable auto-retract.
- * With auto-retract enabled, all G1 E moves over the MIN_RETRACT length
+ * With auto-retract enabled, all G1 E moves within the set range
  * will be converted to firmware-based retract/recover moves.
  *
  * Be sure to turn off auto-retract during filament change.
  */
 //#define FWRETRACT  // ONLY PARTIALLY TESTED
 #if ENABLED(FWRETRACT)
-  #define MIN_RETRACT 0.1                 // A retract/recover of this length or longer can be converted to auto-retract
+  #define MIN_AUTORETRACT 0.1             // When auto-retract is on, convert E moves of this length and over
+  #define MAX_AUTORETRACT 10.0            // Upper limit for auto-retract conversion
   #define RETRACT_LENGTH 3                // Default retract length (positive mm)
   #define RETRACT_LENGTH_SWAP 13          // Default swap retract length (positive mm), for extruder change
   #define RETRACT_FEEDRATE 45             // Default feedrate for retracting (mm/s)

Marlin/example_configurations/BQ/WITBOX/Configuration_adv.h

  * Use M207 and M208 to define parameters for retract / recover.
  *
  * Use M209 to enable or disable auto-retract.
- * With auto-retract enabled, all G1 E moves over the MIN_RETRACT length
+ * With auto-retract enabled, all G1 E moves within the set range
  * will be converted to firmware-based retract/recover moves.
  *
  * Be sure to turn off auto-retract during filament change.
  */
 //#define FWRETRACT  // ONLY PARTIALLY TESTED
 #if ENABLED(FWRETRACT)
-  #define MIN_RETRACT 0.1                 // A retract/recover of this length or longer can be converted to auto-retract
+  #define MIN_AUTORETRACT 0.1             // When auto-retract is on, convert E moves of this length and over
+  #define MAX_AUTORETRACT 10.0            // Upper limit for auto-retract conversion
   #define RETRACT_LENGTH 3                // Default retract length (positive mm)
   #define RETRACT_LENGTH_SWAP 13          // Default swap retract length (positive mm), for extruder change
   #define RETRACT_FEEDRATE 45             // Default feedrate for retracting (mm/s)

Marlin/example_configurations/Cartesio/Configuration_adv.h

  * Use M207 and M208 to define parameters for retract / recover.
  *
  * Use M209 to enable or disable auto-retract.
- * With auto-retract enabled, all G1 E moves over the MIN_RETRACT length
+ * With auto-retract enabled, all G1 E moves within the set range
  * will be converted to firmware-based retract/recover moves.
  *
  * Be sure to turn off auto-retract during filament change.
  */
 //#define FWRETRACT  // ONLY PARTIALLY TESTED
 #if ENABLED(FWRETRACT)
-  #define MIN_RETRACT 0.1                 // A retract/recover of this length or longer can be converted to auto-retract
+  #define MIN_AUTORETRACT 0.1             // When auto-retract is on, convert E moves of this length and over
+  #define MAX_AUTORETRACT 10.0            // Upper limit for auto-retract conversion
   #define RETRACT_LENGTH 3                // Default retract length (positive mm)
   #define RETRACT_LENGTH_SWAP 13          // Default swap retract length (positive mm), for extruder change
   #define RETRACT_FEEDRATE 45             // Default feedrate for retracting (mm/s)

Marlin/example_configurations/Felix/Configuration_adv.h

  * Use M207 and M208 to define parameters for retract / recover.
  *
  * Use M209 to enable or disable auto-retract.
- * With auto-retract enabled, all G1 E moves over the MIN_RETRACT length
+ * With auto-retract enabled, all G1 E moves within the set range
  * will be converted to firmware-based retract/recover moves.
  *
  * Be sure to turn off auto-retract during filament change.
  */
 //#define FWRETRACT  // ONLY PARTIALLY TESTED
 #if ENABLED(FWRETRACT)
-  #define MIN_RETRACT 0.1                 // A retract/recover of this length or longer can be converted to auto-retract
+  #define MIN_AUTORETRACT 0.1             // When auto-retract is on, convert E moves of this length and over
+  #define MAX_AUTORETRACT 10.0            // Upper limit for auto-retract conversion
   #define RETRACT_LENGTH 3                // Default retract length (positive mm)
   #define RETRACT_LENGTH_SWAP 13          // Default swap retract length (positive mm), for extruder change
   #define RETRACT_FEEDRATE 45             // Default feedrate for retracting (mm/s)

Marlin/example_configurations/Folger Tech/i3-2020/Configuration_adv.h

  * Use M207 and M208 to define parameters for retract / recover.
  *
  * Use M209 to enable or disable auto-retract.
- * With auto-retract enabled, all G1 E moves over the MIN_RETRACT length
+ * With auto-retract enabled, all G1 E moves within the set range
  * will be converted to firmware-based retract/recover moves.
  *
  * Be sure to turn off auto-retract during filament change.
  */
 //#define FWRETRACT  // ONLY PARTIALLY TESTED
 #if ENABLED(FWRETRACT)
-  #define MIN_RETRACT 0.1                 // A retract/recover of this length or longer can be converted to auto-retract
+  #define MIN_AUTORETRACT 0.1             // When auto-retract is on, convert E moves of this length and over
+  #define MAX_AUTORETRACT 10.0            // Upper limit for auto-retract conversion
   #define RETRACT_LENGTH 3                // Default retract length (positive mm)
   #define RETRACT_LENGTH_SWAP 13          // Default swap retract length (positive mm), for extruder change
   #define RETRACT_FEEDRATE 45             // Default feedrate for retracting (mm/s)

Marlin/example_configurations/Infitary/i3-M508/Configuration_adv.h

  * Use M207 and M208 to define parameters for retract / recover.
  *
  * Use M209 to enable or disable auto-retract.
- * With auto-retract enabled, all G1 E moves over the MIN_RETRACT length
+ * With auto-retract enabled, all G1 E moves within the set range
  * will be converted to firmware-based retract/recover moves.
  *
  * Be sure to turn off auto-retract during filament change.
  */
 //#define FWRETRACT  // ONLY PARTIALLY TESTED
 #if ENABLED(FWRETRACT)
-  #define MIN_RETRACT 0.1                 // A retract/recover of this length or longer can be converted to auto-retract
+  #define MIN_AUTORETRACT 0.1             // When auto-retract is on, convert E moves of this length and over
+  #define MAX_AUTORETRACT 10.0            // Upper limit for auto-retract conversion
   #define RETRACT_LENGTH 3                // Default retract length (positive mm)
   #define RETRACT_LENGTH_SWAP 13          // Default swap retract length (positive mm), for extruder change
   #define RETRACT_FEEDRATE 45             // Default feedrate for retracting (mm/s)

Marlin/example_configurations/Malyan/M150/Configuration_adv.h

  * Use M207 and M208 to define parameters for retract / recover.
  *
  * Use M209 to enable or disable auto-retract.
- * With auto-retract enabled, all G1 E moves over the MIN_RETRACT length
+ * With auto-retract enabled, all G1 E moves within the set range
  * will be converted to firmware-based retract/recover moves.
  *
  * Be sure to turn off auto-retract during filament change.
  */
 //#define FWRETRACT  // ONLY PARTIALLY TESTED
 #if ENABLED(FWRETRACT)
-  #define MIN_RETRACT 0.1                 // A retract/recover of this length or longer can be converted to auto-retract
+  #define MIN_AUTORETRACT 0.1             // When auto-retract is on, convert E moves of this length and over
+  #define MAX_AUTORETRACT 10.0            // Upper limit for auto-retract conversion
   #define RETRACT_LENGTH 3                // Default retract length (positive mm)
   #define RETRACT_LENGTH_SWAP 13          // Default swap retract length (positive mm), for extruder change
   #define RETRACT_FEEDRATE 45             // Default feedrate for retracting (mm/s)

Marlin/example_configurations/RigidBot/Configuration_adv.h

  * Use M207 and M208 to define parameters for retract / recover.
  *
  * Use M209 to enable or disable auto-retract.
- * With auto-retract enabled, all G1 E moves over the MIN_RETRACT length
+ * With auto-retract enabled, all G1 E moves within the set range
  * will be converted to firmware-based retract/recover moves.
  *
  * Be sure to turn off auto-retract during filament change.
  */
 //#define FWRETRACT  // ONLY PARTIALLY TESTED
 #if ENABLED(FWRETRACT)
-  #define MIN_RETRACT 0.1                 // A retract/recover of this length or longer can be converted to auto-retract
+  #define MIN_AUTORETRACT 0.1             // When auto-retract is on, convert E moves of this length and over
+  #define MAX_AUTORETRACT 10.0            // Upper limit for auto-retract conversion
   #define RETRACT_LENGTH 3                // Default retract length (positive mm)
   #define RETRACT_LENGTH_SWAP 13          // Default swap retract length (positive mm), for extruder change
   #define RETRACT_FEEDRATE 45             // Default feedrate for retracting (mm/s)

Marlin/example_configurations/SCARA/Configuration_adv.h

  * Use M207 and M208 to define parameters for retract / recover.
  *
  * Use M209 to enable or disable auto-retract.
- * With auto-retract enabled, all G1 E moves over the MIN_RETRACT length
+ * With auto-retract enabled, all G1 E moves within the set range
  * will be converted to firmware-based retract/recover moves.
  *
  * Be sure to turn off auto-retract during filament change.
  */
 //#define FWRETRACT  // ONLY PARTIALLY TESTED
 #if ENABLED(FWRETRACT)
-  #define MIN_RETRACT 0.1                 // A retract/recover of this length or longer can be converted to auto-retract
+  #define MIN_AUTORETRACT 0.1             // When auto-retract is on, convert E moves of this length and over
+  #define MAX_AUTORETRACT 10.0            // Upper limit for auto-retract conversion
   #define RETRACT_LENGTH 3                // Default retract length (positive mm)
   #define RETRACT_LENGTH_SWAP 13          // Default swap retract length (positive mm), for extruder change
   #define RETRACT_FEEDRATE 35             // Default feedrate for retracting (mm/s)

Marlin/example_configurations/TinyBoy2/Configuration_adv.h

  * Use M207 and M208 to define parameters for retract / recover.
  *
  * Use M209 to enable or disable auto-retract.
- * With auto-retract enabled, all G1 E moves over the MIN_RETRACT length
+ * With auto-retract enabled, all G1 E moves within the set range
  * will be converted to firmware-based retract/recover moves.
  *
  * Be sure to turn off auto-retract during filament change.
  */
 //#define FWRETRACT  // ONLY PARTIALLY TESTED
 #if ENABLED(FWRETRACT)
-  #define MIN_RETRACT 0.1                 // A retract/recover of this length or longer can be converted to auto-retract
+  #define MIN_AUTORETRACT 0.1             // When auto-retract is on, convert E moves of this length and over
+  #define MAX_AUTORETRACT 10.0            // Upper limit for auto-retract conversion
   #define RETRACT_LENGTH 3                // Default retract length (positive mm)
   #define RETRACT_LENGTH_SWAP 13          // Default swap retract length (positive mm), for extruder change
   #define RETRACT_FEEDRATE 45             // Default feedrate for retracting (mm/s)

Marlin/example_configurations/Velleman/K8200/Configuration_adv.h

  * Use M207 and M208 to define parameters for retract / recover.
  *
  * Use M209 to enable or disable auto-retract.
- * With auto-retract enabled, all G1 E moves over the MIN_RETRACT length
+ * With auto-retract enabled, all G1 E moves within the set range
  * will be converted to firmware-based retract/recover moves.
  *
  * Be sure to turn off auto-retract during filament change.
  */
 //#define FWRETRACT  // ONLY PARTIALLY TESTED
 #if ENABLED(FWRETRACT)
-  #define MIN_RETRACT 0.1                 // A retract/recover of this length or longer can be converted to auto-retract
+  #define MIN_AUTORETRACT 0.1             // When auto-retract is on, convert E moves of this length and over
+  #define MAX_AUTORETRACT 10.0            // Upper limit for auto-retract conversion
   #define RETRACT_LENGTH 3                // Default retract length (positive mm)
   #define RETRACT_LENGTH_SWAP 13          // Default swap retract length (positive mm), for extruder change
   #define RETRACT_FEEDRATE 45             // Default feedrate for retracting (mm/s)

Marlin/example_configurations/Velleman/K8400/Configuration_adv.h

  * Use M207 and M208 to define parameters for retract / recover.
  *
  * Use M209 to enable or disable auto-retract.
- * With auto-retract enabled, all G1 E moves over the MIN_RETRACT length
+ * With auto-retract enabled, all G1 E moves within the set range
  * will be converted to firmware-based retract/recover moves.
  *
  * Be sure to turn off auto-retract during filament change.
  */
 //#define FWRETRACT  // ONLY PARTIALLY TESTED
 #if ENABLED(FWRETRACT)
-  #define MIN_RETRACT 0.1                 // A retract/recover of this length or longer can be converted to auto-retract
+  #define MIN_AUTORETRACT 0.1             // When auto-retract is on, convert E moves of this length and over
+  #define MAX_AUTORETRACT 10.0            // Upper limit for auto-retract conversion
   #define RETRACT_LENGTH 3                // Default retract length (positive mm)
   #define RETRACT_LENGTH_SWAP 13          // Default swap retract length (positive mm), for extruder change
   #define RETRACT_FEEDRATE 45             // Default feedrate for retracting (mm/s)

Marlin/example_configurations/delta/FLSUN/auto_calibrate/Configuration_adv.h

  * Use M207 and M208 to define parameters for retract / recover.
  *
  * Use M209 to enable or disable auto-retract.
- * With auto-retract enabled, all G1 E moves over the MIN_RETRACT length
+ * With auto-retract enabled, all G1 E moves within the set range
  * will be converted to firmware-based retract/recover moves.
  *
  * Be sure to turn off auto-retract during filament change.
  */
 //#define FWRETRACT  // ONLY PARTIALLY TESTED
 #if ENABLED(FWRETRACT)
-  #define MIN_RETRACT 0.1                 // A retract/recover of this length or longer can be converted to auto-retract
+  #define MIN_AUTORETRACT 0.1             // When auto-retract is on, convert E moves of this length and over
+  #define MAX_AUTORETRACT 10.0            // Upper limit for auto-retract conversion
   #define RETRACT_LENGTH 3                // Default retract length (positive mm)
   #define RETRACT_LENGTH_SWAP 13          // Default swap retract length (positive mm), for extruder change
   #define RETRACT_FEEDRATE 45             // Default feedrate for retracting (mm/s)

Marlin/example_configurations/delta/FLSUN/kossel_mini/Configuration_adv.h

  * Use M207 and M208 to define parameters for retract / recover.
  *
  * Use M209 to enable or disable auto-retract.
- * With auto-retract enabled, all G1 E moves over the MIN_RETRACT length
+ * With auto-retract enabled, all G1 E moves within the set range
  * will be converted to firmware-based retract/recover moves.
  *
  * Be sure to turn off auto-retract during filament change.
  */
 //#define FWRETRACT  // ONLY PARTIALLY TESTED
 #if ENABLED(FWRETRACT)
-  #define MIN_RETRACT 0.1                 // A retract/recover of this length or longer can be converted to auto-retract
+  #define MIN_AUTORETRACT 0.1             // When auto-retract is on, convert E moves of this length and over
+  #define MAX_AUTORETRACT 10.0            // Upper limit for auto-retract conversion
   #define RETRACT_LENGTH 3                // Default retract length (positive mm)
   #define RETRACT_LENGTH_SWAP 13          // Default swap retract length (positive mm), for extruder change
   #define RETRACT_FEEDRATE 45             // Default feedrate for retracting (mm/s)

Marlin/example_configurations/delta/generic/Configuration_adv.h

  * Use M207 and M208 to define parameters for retract / recover.
  *
  * Use M209 to enable or disable auto-retract.
- * With auto-retract enabled, all G1 E moves over the MIN_RETRACT length
+ * With auto-retract enabled, all G1 E moves within the set range
  * will be converted to firmware-based retract/recover moves.
  *
  * Be sure to turn off auto-retract during filament change.
  */
 //#define FWRETRACT  // ONLY PARTIALLY TESTED
 #if ENABLED(FWRETRACT)
-  #define MIN_RETRACT 0.1                 // A retract/recover of this length or longer can be converted to auto-retract
+  #define MIN_AUTORETRACT 0.1             // When auto-retract is on, convert E moves of this length and over
+  #define MAX_AUTORETRACT 10.0            // Upper limit for auto-retract conversion
   #define RETRACT_LENGTH 3                // Default retract length (positive mm)
   #define RETRACT_LENGTH_SWAP 13          // Default swap retract length (positive mm), for extruder change
   #define RETRACT_FEEDRATE 45             // Default feedrate for retracting (mm/s)

Marlin/example_configurations/delta/kossel_mini/Configuration_adv.h

  * Use M207 and M208 to define parameters for retract / recover.
  *
  * Use M209 to enable or disable auto-retract.
- * With auto-retract enabled, all G1 E moves over the MIN_RETRACT length
+ * With auto-retract enabled, all G1 E moves within the set range
  * will be converted to firmware-based retract/recover moves.
  *
  * Be sure to turn off auto-retract during filament change.
  */
 //#define FWRETRACT  // ONLY PARTIALLY TESTED
 #if ENABLED(FWRETRACT)
-  #define MIN_RETRACT 0.1                 // A retract/recover of this length or longer can be converted to auto-retract
+  #define MIN_AUTORETRACT 0.1             // When auto-retract is on, convert E moves of this length and over
+  #define MAX_AUTORETRACT 10.0            // Upper limit for auto-retract conversion
   #define RETRACT_LENGTH 3                // Default retract length (positive mm)
   #define RETRACT_LENGTH_SWAP 13          // Default swap retract length (positive mm), for extruder change
   #define RETRACT_FEEDRATE 45             // Default feedrate for retracting (mm/s)

Marlin/example_configurations/delta/kossel_pro/Configuration_adv.h

  * Use M207 and M208 to define parameters for retract / recover.
  *
  * Use M209 to enable or disable auto-retract.
- * With auto-retract enabled, all G1 E moves over the MIN_RETRACT length
+ * With auto-retract enabled, all G1 E moves within the set range
  * will be converted to firmware-based retract/recover moves.
  *
  * Be sure to turn off auto-retract during filament change.
  */
 //#define FWRETRACT  // ONLY PARTIALLY TESTED
 #if ENABLED(FWRETRACT)
-  #define MIN_RETRACT 0.1                 // A retract/recover of this length or longer can be converted to auto-retract
+  #define MIN_AUTORETRACT 0.1             // When auto-retract is on, convert E moves of this length and over
+  #define MAX_AUTORETRACT 10.0            // Upper limit for auto-retract conversion
   #define RETRACT_LENGTH 3                // Default retract length (positive mm)
   #define RETRACT_LENGTH_SWAP 13          // Default swap retract length (positive mm), for extruder change
   #define RETRACT_FEEDRATE 45             // Default feedrate for retracting (mm/s)

Marlin/example_configurations/delta/kossel_xl/Configuration_adv.h

  * Use M207 and M208 to define parameters for retract / recover.
  *
  * Use M209 to enable or disable auto-retract.
- * With auto-retract enabled, all G1 E moves over the MIN_RETRACT length
+ * With auto-retract enabled, all G1 E moves within the set range
  * will be converted to firmware-based retract/recover moves.
  *
  * Be sure to turn off auto-retract during filament change.
  */
 //#define FWRETRACT  // ONLY PARTIALLY TESTED
 #if ENABLED(FWRETRACT)
-  #define MIN_RETRACT 0.1                 // A retract/recover of this length or longer can be converted to auto-retract
+  #define MIN_AUTORETRACT 0.1             // When auto-retract is on, convert E moves of this length and over
+  #define MAX_AUTORETRACT 10.0            // Upper limit for auto-retract conversion
   #define RETRACT_LENGTH 3                // Default retract length (positive mm)
   #define RETRACT_LENGTH_SWAP 13          // Default swap retract length (positive mm), for extruder change
   #define RETRACT_FEEDRATE 45             // Default feedrate for retracting (mm/s)

Marlin/example_configurations/gCreate/gMax1.5+/Configuration_adv.h

  * Use M207 and M208 to define parameters for retract / recover.
  *
  * Use M209 to enable or disable auto-retract.
- * With auto-retract enabled, all G1 E moves over the MIN_RETRACT length
+ * With auto-retract enabled, all G1 E moves within the set range
  * will be converted to firmware-based retract/recover moves.
  *
  * Be sure to turn off auto-retract during filament change.
  */
 //#define FWRETRACT  // ONLY PARTIALLY TESTED
 #if ENABLED(FWRETRACT)
-  #define MIN_RETRACT 0.1                 // A retract/recover of this length or longer can be converted to auto-retract
+  #define MIN_AUTORETRACT 0.1             // When auto-retract is on, convert E moves of this length and over
+  #define MAX_AUTORETRACT 10.0            // Upper limit for auto-retract conversion
   #define RETRACT_LENGTH 3                // Default retract length (positive mm)
   #define RETRACT_LENGTH_SWAP 13          // Default swap retract length (positive mm), for extruder change
   #define RETRACT_FEEDRATE 45             // Default feedrate for retracting (mm/s)

Marlin/example_configurations/makibox/Configuration_adv.h

  * Use M207 and M208 to define parameters for retract / recover.
  *
  * Use M209 to enable or disable auto-retract.
- * With auto-retract enabled, all G1 E moves over the MIN_RETRACT length
+ * With auto-retract enabled, all G1 E moves within the set range
  * will be converted to firmware-based retract/recover moves.
  *
  * Be sure to turn off auto-retract during filament change.
  */
 //#define FWRETRACT  // ONLY PARTIALLY TESTED
 #if ENABLED(FWRETRACT)
-  #define MIN_RETRACT 0.1                 // A retract/recover of this length or longer can be converted to auto-retract
+  #define MIN_AUTORETRACT 0.1             // When auto-retract is on, convert E moves of this length and over
+  #define MAX_AUTORETRACT 10.0            // Upper limit for auto-retract conversion
   #define RETRACT_LENGTH 3                // Default retract length (positive mm)
   #define RETRACT_LENGTH_SWAP 13          // Default swap retract length (positive mm), for extruder change
   #define RETRACT_FEEDRATE 45             // Default feedrate for retracting (mm/s)

Marlin/example_configurations/tvrrug/Round2/Configuration_adv.h

  * Use M207 and M208 to define parameters for retract / recover.
  *
  * Use M209 to enable or disable auto-retract.
- * With auto-retract enabled, all G1 E moves over the MIN_RETRACT length
+ * With auto-retract enabled, all G1 E moves within the set range
  * will be converted to firmware-based retract/recover moves.
  *
  * Be sure to turn off auto-retract during filament change.
  */
 //#define FWRETRACT  // ONLY PARTIALLY TESTED
 #if ENABLED(FWRETRACT)
-  #define MIN_RETRACT 0.1                 // A retract/recover of this length or longer can be converted to auto-retract
+  #define MIN_AUTORETRACT 0.1             // When auto-retract is on, convert E moves of this length and over
+  #define MAX_AUTORETRACT 10.0            // Upper limit for auto-retract conversion
   #define RETRACT_LENGTH 3                // Default retract length (positive mm)
   #define RETRACT_LENGTH_SWAP 13          // Default swap retract length (positive mm), for extruder change
   #define RETRACT_FEEDRATE 45             // Default feedrate for retracting (mm/s)

Marlin/example_configurations/wt150/Configuration_adv.h

  * Use M207 and M208 to define parameters for retract / recover.
  *
  * Use M209 to enable or disable auto-retract.
- * With auto-retract enabled, all G1 E moves over the MIN_RETRACT length
+ * With auto-retract enabled, all G1 E moves within the set range
  * will be converted to firmware-based retract/recover moves.
  *
  * Be sure to turn off auto-retract during filament change.
  */
 //#define FWRETRACT  // ONLY PARTIALLY TESTED
 #if ENABLED(FWRETRACT)
-  #define MIN_RETRACT 0.1                 // A retract/recover of this length or longer can be converted to auto-retract
+  #define MIN_AUTORETRACT 0.1             // When auto-retract is on, convert E moves of this length and over
+  #define MAX_AUTORETRACT 10.0            // Upper limit for auto-retract conversion
   #define RETRACT_LENGTH 3                // Default retract length (positive mm)
   #define RETRACT_LENGTH_SWAP 13          // Default swap retract length (positive mm), for extruder change
   #define RETRACT_FEEDRATE 45             // Default feedrate for retracting (mm/s)