Make M851 standard with a bed probe

Marlin/Configuration.h

 //============================= Additional Features ===========================
 //=============================================================================
 
-// @section more
-
-// Custom M code points
-#define CUSTOM_M_CODES
-#if ENABLED(CUSTOM_M_CODES)
-  #if ENABLED(AUTO_BED_LEVELING_FEATURE)
-    #define CUSTOM_M_CODE_SET_Z_PROBE_OFFSET 851
-    #define Z_PROBE_OFFSET_RANGE_MIN -20
-    #define Z_PROBE_OFFSET_RANGE_MAX 20
-  #endif
-#endif
-
 // @section extras
 
 //

Marlin/Marlin.h

   extern float z_endstop_adj;
 #endif
 
-#if ENABLED(AUTO_BED_LEVELING_FEATURE)
+#if HAS_BED_PROBE
   extern float zprobe_zoffset;
 #endif
 

Marlin/Marlin_main.cpp

 
 static uint8_t target_extruder;
 
+#if HAS_BED_PROBE
+  float zprobe_zoffset = Z_PROBE_OFFSET_FROM_EXTRUDER;
+#endif
+
 #if ENABLED(AUTO_BED_LEVELING_FEATURE)
   int xy_travel_speed = XY_TRAVEL_SPEED;
-  float zprobe_zoffset = Z_PROBE_OFFSET_FROM_EXTRUDER;
   bool bed_leveling_in_progress = false;
 #endif
 
     current_position[axis] = base_home_pos(axis) + home_offset[axis];
     update_software_endstops(axis);
 
-    #if ENABLED(AUTO_BED_LEVELING_FEATURE) && Z_HOME_DIR < 0
+    #if HAS_BED_PROBE && Z_HOME_DIR < 0
       if (axis == Z_AXIS) {
         current_position[Z_AXIS] -= zprobe_zoffset;
         #if ENABLED(DEBUG_LEVELING_FEATURE)
 
 #endif // ABORT_ON_ENDSTOP_HIT_FEATURE_ENABLED
 
-#ifdef CUSTOM_M_CODE_SET_Z_PROBE_OFFSET
+#if HAS_BED_PROBE
 
-  inline void gcode_SET_Z_PROBE_OFFSET() {
+  inline void gcode_M851() {
 
     SERIAL_ECHO_START;
     SERIAL_ECHOPGM(MSG_ZPROBE_ZOFFSET);
     SERIAL_EOL;
   }
 
-#endif // CUSTOM_M_CODE_SET_Z_PROBE_OFFSET
+#endif // HAS_BED_PROBE
 
 #if ENABLED(FILAMENTCHANGEENABLE)
 
 
       #ifdef CUSTOM_M_CODE_SET_Z_PROBE_OFFSET
         case CUSTOM_M_CODE_SET_Z_PROBE_OFFSET:
-          gcode_SET_Z_PROBE_OFFSET();
+          gcode_M851();
           break;
       #endif // CUSTOM_M_CODE_SET_Z_PROBE_OFFSET
 

Marlin/configuration_store.cpp

     for (uint8_t q = 0; q < mesh_num_x * mesh_num_y; q++) EEPROM_WRITE_VAR(i, dummy);
   #endif // MESH_BED_LEVELING
 
-  #if DISABLED(AUTO_BED_LEVELING_FEATURE)
+  #if !HAS_BED_PROBE
     float zprobe_zoffset = 0;
   #endif
   EEPROM_WRITE_VAR(i, zprobe_zoffset);
       for (uint8_t q = 0; q < mesh_num_x * mesh_num_y; q++) EEPROM_READ_VAR(i, dummy);
     #endif // MESH_BED_LEVELING
 
-    #if DISABLED(AUTO_BED_LEVELING_FEATURE)
+    #if !HAS_BED_PROBE
       float zprobe_zoffset = 0;
     #endif
     EEPROM_READ_VAR(i, zprobe_zoffset);
     mbl.reset();
   #endif
 
-  #if ENABLED(AUTO_BED_LEVELING_FEATURE)
+  #if HAS_BED_PROBE
     zprobe_zoffset = Z_PROBE_OFFSET_FROM_EXTRUDER;
   #endif
 
   /**
    * Auto Bed Leveling
    */
-  #if ENABLED(AUTO_BED_LEVELING_FEATURE)
-    #if ENABLED(CUSTOM_M_CODES)
-      if (!forReplay) {
-        CONFIG_ECHO_START;
-        SERIAL_ECHOLNPGM("Z-Probe Offset (mm):");
-      }
+  #if HAS_BED_PROBE
+    if (!forReplay) {
       CONFIG_ECHO_START;
-      SERIAL_ECHOPAIR("  M" STRINGIFY(CUSTOM_M_CODE_SET_Z_PROBE_OFFSET) " Z", zprobe_zoffset);
-    #else
-      if (!forReplay) {
-        CONFIG_ECHO_START;
-        SERIAL_ECHOPAIR("Z-Probe Offset (mm):", zprobe_zoffset);
-      }
-    #endif
+      SERIAL_ECHOLNPGM("Z-Probe Offset (mm):");
+    }
+    CONFIG_ECHO_START;
+    SERIAL_ECHOPAIR("  M851 Z", zprobe_zoffset);
     SERIAL_EOL;
   #endif
 }

Marlin/example_configurations/Cartesio/Configuration.h

 //============================= Additional Features ===========================
 //=============================================================================
 
-// @section more
-
-// Custom M code points
-#define CUSTOM_M_CODES
-#if ENABLED(CUSTOM_M_CODES)
-  #if ENABLED(AUTO_BED_LEVELING_FEATURE)
-    #define CUSTOM_M_CODE_SET_Z_PROBE_OFFSET 851
-    #define Z_PROBE_OFFSET_RANGE_MIN -20
-    #define Z_PROBE_OFFSET_RANGE_MAX 20
-  #endif
-#endif
-
 // @section extras
 
 //

Marlin/example_configurations/Felix/Configuration.h

 //============================= Additional Features ===========================
 //=============================================================================
 
-// @section more
-
-// Custom M code points
-#define CUSTOM_M_CODES
-#if ENABLED(CUSTOM_M_CODES)
-  #if ENABLED(AUTO_BED_LEVELING_FEATURE)
-    #define CUSTOM_M_CODE_SET_Z_PROBE_OFFSET 851
-    #define Z_PROBE_OFFSET_RANGE_MIN -20
-    #define Z_PROBE_OFFSET_RANGE_MAX 20
-  #endif
-#endif
-
 // @section extras
 
 //

Marlin/example_configurations/Felix/DUAL/Configuration.h

 //============================= Additional Features ===========================
 //=============================================================================
 
-// @section more
-
-// Custom M code points
-#define CUSTOM_M_CODES
-#if ENABLED(CUSTOM_M_CODES)
-  #if ENABLED(AUTO_BED_LEVELING_FEATURE)
-    #define CUSTOM_M_CODE_SET_Z_PROBE_OFFSET 851
-    #define Z_PROBE_OFFSET_RANGE_MIN -20
-    #define Z_PROBE_OFFSET_RANGE_MAX 20
-  #endif
-#endif
-
 // @section extras
 
 //

Marlin/example_configurations/Hephestos/Configuration.h

 //============================= Additional Features ===========================
 //=============================================================================
 
-// @section more
-
-// Custom M code points
-#define CUSTOM_M_CODES
-#if ENABLED(CUSTOM_M_CODES)
-  #if ENABLED(AUTO_BED_LEVELING_FEATURE)
-    #define CUSTOM_M_CODE_SET_Z_PROBE_OFFSET 851
-    #define Z_PROBE_OFFSET_RANGE_MIN -20
-    #define Z_PROBE_OFFSET_RANGE_MAX 20
-  #endif
-#endif
-
 // @section extras
 
 //

Marlin/example_configurations/Hephestos_2/Configuration.h

 //============================= Additional Features ===========================
 //=============================================================================
 
-// @section more
-
-// Custom M code points
-#define CUSTOM_M_CODES
-#if ENABLED(CUSTOM_M_CODES)
-  #if ENABLED(AUTO_BED_LEVELING_FEATURE)
-    #define CUSTOM_M_CODE_SET_Z_PROBE_OFFSET 851
-    #define Z_PROBE_OFFSET_RANGE_MIN -5
-    #define Z_PROBE_OFFSET_RANGE_MAX  0
-  #endif
-#endif
+// @section probes
+
+#define Z_PROBE_OFFSET_RANGE_MIN -5
+#define Z_PROBE_OFFSET_RANGE_MAX  0
 
 // @section extras
 

Marlin/example_configurations/K8200/Configuration.h

 //============================= Additional Features ===========================
 //=============================================================================
 
-// @section more
-
-// Custom M code points
-#define CUSTOM_M_CODES
-#if ENABLED(CUSTOM_M_CODES)
-  #if ENABLED(AUTO_BED_LEVELING_FEATURE)
-    #define CUSTOM_M_CODE_SET_Z_PROBE_OFFSET 851
-    #define Z_PROBE_OFFSET_RANGE_MIN -20
-    #define Z_PROBE_OFFSET_RANGE_MAX 20
-  #endif
-#endif
-
 // @section extras
 
 //

Marlin/example_configurations/RepRapWorld/Megatronics/Configuration.h

 //============================= Additional Features ===========================
 //=============================================================================
 
-// @section more
-
-// Custom M code points
-#define CUSTOM_M_CODES
-#if ENABLED(CUSTOM_M_CODES)
-  #if ENABLED(AUTO_BED_LEVELING_FEATURE)
-    #define CUSTOM_M_CODE_SET_Z_PROBE_OFFSET 851
-    #define Z_PROBE_OFFSET_RANGE_MIN -20
-    #define Z_PROBE_OFFSET_RANGE_MAX 20
-  #endif
-#endif
-
 // @section extras
 
 //

Marlin/example_configurations/RigidBot/Configuration.h

 //============================= Additional Features ===========================
 //=============================================================================
 
-// @section more
-
-// Custom M code points
-#define CUSTOM_M_CODES
-#if ENABLED(CUSTOM_M_CODES)
-  #if ENABLED(AUTO_BED_LEVELING_FEATURE)
-    #define CUSTOM_M_CODE_SET_Z_PROBE_OFFSET 851
-    #define Z_PROBE_OFFSET_RANGE_MIN -20
-    #define Z_PROBE_OFFSET_RANGE_MAX 20
-  #endif
-#endif
-
 // @section extras
 
 //

Marlin/example_configurations/SCARA/Configuration.h

 //============================= Additional Features ===========================
 //=============================================================================
 
-// @section more
-
-// Custom M code points
-//#define CUSTOM_M_CODES
-#if ENABLED(CUSTOM_M_CODES)
-  #if ENABLED(AUTO_BED_LEVELING_FEATURE)
-    #define CUSTOM_M_CODE_SET_Z_PROBE_OFFSET 851
-    #define Z_PROBE_OFFSET_RANGE_MIN -20
-    #define Z_PROBE_OFFSET_RANGE_MAX 20
-  #endif
-#endif
-
 // @section extras
 
 //

Marlin/example_configurations/TAZ4/Configuration.h

 //============================= Additional Features ===========================
 //=============================================================================
 
-// @section more
-
-// Custom M code points
-#define CUSTOM_M_CODES
-#if ENABLED(CUSTOM_M_CODES)
-  #if ENABLED(AUTO_BED_LEVELING_FEATURE)
-    #define CUSTOM_M_CODE_SET_Z_PROBE_OFFSET 851
-    #define Z_PROBE_OFFSET_RANGE_MIN -20
-    #define Z_PROBE_OFFSET_RANGE_MAX 20
-  #endif
-#endif
-
 // @section extras
 
 //

Marlin/example_configurations/WITBOX/Configuration.h

 //============================= Additional Features ===========================
 //=============================================================================
 
-// @section more
-
-// Custom M code points
-#define CUSTOM_M_CODES
-#if ENABLED(CUSTOM_M_CODES)
-  #if ENABLED(AUTO_BED_LEVELING_FEATURE)
-    #define CUSTOM_M_CODE_SET_Z_PROBE_OFFSET 851
-    #define Z_PROBE_OFFSET_RANGE_MIN -20
-    #define Z_PROBE_OFFSET_RANGE_MAX 20
-  #endif
-#endif
-
 // @section extras
 
 //

Marlin/example_configurations/adafruit/ST7565/Configuration.h

 //============================= Additional Features ===========================
 //=============================================================================
 
-// @section more
-
-// Custom M code points
-#define CUSTOM_M_CODES
-#if ENABLED(CUSTOM_M_CODES)
-  #if ENABLED(AUTO_BED_LEVELING_FEATURE)
-    #define CUSTOM_M_CODE_SET_Z_PROBE_OFFSET 851
-    #define Z_PROBE_OFFSET_RANGE_MIN -20
-    #define Z_PROBE_OFFSET_RANGE_MAX 20
-  #endif
-#endif
-
 // @section extras
 
 //

Marlin/example_configurations/delta/biv2.5/Configuration.h

 //============================= Additional Features ===========================
 //=============================================================================
 
-// @section more
-
-// Custom M code points
-#define CUSTOM_M_CODES
-#if ENABLED(CUSTOM_M_CODES)
-  #if ENABLED(AUTO_BED_LEVELING_FEATURE)
-    #define CUSTOM_M_CODE_SET_Z_PROBE_OFFSET 851
-    #define Z_PROBE_OFFSET_RANGE_MIN -20
-    #define Z_PROBE_OFFSET_RANGE_MAX 20
-  #endif
-#endif
-
 // @section extras
 
 //

Marlin/example_configurations/delta/generic/Configuration.h

 //============================= Additional Features ===========================
 //=============================================================================
 
-// @section more
-
-// Custom M code points
-#define CUSTOM_M_CODES
-#if ENABLED(CUSTOM_M_CODES)
-  #if ENABLED(AUTO_BED_LEVELING_FEATURE)
-    #define CUSTOM_M_CODE_SET_Z_PROBE_OFFSET 851
-    #define Z_PROBE_OFFSET_RANGE_MIN -20
-    #define Z_PROBE_OFFSET_RANGE_MAX 20
-  #endif
-#endif
-
 // @section extras
 
 //

Marlin/example_configurations/delta/kossel_mini/Configuration.h

 //============================= Additional Features ===========================
 //=============================================================================
 
-// @section more
-
-// Custom M code points
-#define CUSTOM_M_CODES
-#if ENABLED(CUSTOM_M_CODES)
-  #if ENABLED(AUTO_BED_LEVELING_FEATURE)
-    #define CUSTOM_M_CODE_SET_Z_PROBE_OFFSET 851
-    #define Z_PROBE_OFFSET_RANGE_MIN -20
-    #define Z_PROBE_OFFSET_RANGE_MAX 20
-  #endif
-#endif
-
 // @section extras
 
 //

Marlin/example_configurations/delta/kossel_pro/Configuration.h

 //============================= Additional Features ===========================
 //=============================================================================
 
-// @section more
-
-// Custom M code points
-#define CUSTOM_M_CODES
-#if ENABLED(CUSTOM_M_CODES)
-  #if ENABLED(AUTO_BED_LEVELING_FEATURE)
-    #define CUSTOM_M_CODE_SET_Z_PROBE_OFFSET 851
-    #define Z_PROBE_OFFSET_RANGE_MIN -15
-    #define Z_PROBE_OFFSET_RANGE_MAX -5
-  #endif
-#endif
+// @section probes
+
+#define Z_PROBE_OFFSET_RANGE_MIN -15
+#define Z_PROBE_OFFSET_RANGE_MAX   5
 
 // @section extras
 

Marlin/example_configurations/delta/kossel_xl/Configuration.h

 //============================= Additional Features ===========================
 //=============================================================================
 
-// @section more
-
-// Custom M code points
-#define CUSTOM_M_CODES
-#if ENABLED(CUSTOM_M_CODES)
-  #if ENABLED(AUTO_BED_LEVELING_FEATURE)
-    #define CUSTOM_M_CODE_SET_Z_PROBE_OFFSET 851
-    #define Z_PROBE_OFFSET_RANGE_MIN -20
-    #define Z_PROBE_OFFSET_RANGE_MAX 20
-  #endif
-#endif
-
 // @section extras
 
 //

Marlin/example_configurations/makibox/Configuration.h

 //============================= Additional Features ===========================
 //=============================================================================
 
-// @section more
-
-// Custom M code points
-#define CUSTOM_M_CODES
-#if ENABLED(CUSTOM_M_CODES)
-  #if ENABLED(AUTO_BED_LEVELING_FEATURE)
-    #define CUSTOM_M_CODE_SET_Z_PROBE_OFFSET 851
-    #define Z_PROBE_OFFSET_RANGE_MIN -20
-    #define Z_PROBE_OFFSET_RANGE_MAX 20
-  #endif
-#endif
-
 // @section extras
 
 //

Marlin/example_configurations/tvrrug/Round2/Configuration.h

 //============================= Additional Features ===========================
 //=============================================================================
 
-// @section more
-
-// Custom M code points
-#define CUSTOM_M_CODES
-#if ENABLED(CUSTOM_M_CODES)
-  #if ENABLED(AUTO_BED_LEVELING_FEATURE)
-    #define CUSTOM_M_CODE_SET_Z_PROBE_OFFSET 851
-    #define Z_PROBE_OFFSET_RANGE_MIN -20
-    #define Z_PROBE_OFFSET_RANGE_MAX 20
-  #endif
-#endif
-
 // @section extras
 
 //

Marlin/ultralcd.cpp

   static void lcd_control_motion_menu() {
     START_MENU();
     MENU_ITEM(back, MSG_CONTROL);
-    #if ENABLED(AUTO_BED_LEVELING_FEATURE)
+    #if HAS_BED_PROBE
       MENU_ITEM_EDIT(float32, MSG_ZPROBE_ZOFFSET, &zprobe_zoffset, Z_PROBE_OFFSET_RANGE_MIN, Z_PROBE_OFFSET_RANGE_MAX);
     #endif
     // Manual bed leveling, Bed Z: