Replace MBL Z hacking

Marlin/Conditionals_post.h

   #ifndef Z_CLEARANCE_BETWEEN_PROBES
     #define Z_CLEARANCE_BETWEEN_PROBES Z_HOMING_HEIGHT
   #endif
+  #if Z_CLEARANCE_BETWEEN_PROBES > Z_HOMING_HEIGHT
+    #define MANUAL_PROBE_HEIGHT Z_CLEARANCE_BETWEEN_PROBES
+  #else
+    #define MANUAL_PROBE_HEIGHT Z_HOMING_HEIGHT
+  #endif
 
   #if IS_KINEMATIC
     // Check for this in the code instead

Marlin/Configuration.h

   #define MESH_INSET 10        // Mesh inset margin on print area
   #define MESH_NUM_X_POINTS 3  // Don't use more than 7 points per axis, implementation limited.
   #define MESH_NUM_Y_POINTS 3
-  #define MESH_HOME_SEARCH_Z 4  // Z after Home, bed somewhere below but above 0.0.
+  #define MANUAL_PROBE_Z_RANGE 4 // Z Range centered on Z_MIN_POS for LCD Z adjustment
 
-  //#define MESH_G28_REST_ORIGIN // After homing all axes ('G28' or 'G28 XYZ') rest at origin [0,0,0]
+  //#define MESH_G28_REST_ORIGIN // After homing all axes ('G28' or 'G28 XYZ') rest Z at Z_MIN_POS
 
   //#define MANUAL_BED_LEVELING  // Add display menu option for bed leveling.
 

Marlin/Marlin_main.cpp

   stepper.synchronize();
 
   // Disable the leveling matrix before homing
-  #if PLANNER_LEVELING
+  #if PLANNER_LEVELING || ENABLED(MESH_BED_LEVELING)
     set_bed_leveling_enabled(false);
   #endif
 
     extruder_duplication_enabled = false;
   #endif
 
-  /**
-   * For mesh bed leveling deactivate the mesh calculations, will be turned
-   * on again when homing all axis
-   */
-  #if ENABLED(MESH_BED_LEVELING)
-    float pre_home_z = MESH_HOME_SEARCH_Z;
-    if (mbl.active()) {
-      #if ENABLED(DEBUG_LEVELING_FEATURE)
-        if (DEBUGGING(LEVELING)) SERIAL_ECHOLNPGM("MBL was active");
-      #endif
-      // Use known Z position if already homed
-      if (axis_homed[X_AXIS] && axis_homed[Y_AXIS] && axis_homed[Z_AXIS]) {
-        set_bed_leveling_enabled(false);
-        pre_home_z = current_position[Z_AXIS];
-      }
-      else {
-        mbl.set_active(false);
-        current_position[Z_AXIS] = pre_home_z;
-      }
-      #if ENABLED(DEBUG_LEVELING_FEATURE)
-        if (DEBUGGING(LEVELING)) DEBUG_POS("Set Z to pre_home_z", current_position);
-      #endif
-    }
-  #endif
-
   setup_for_endstop_or_probe_move();
   #if ENABLED(DEBUG_LEVELING_FEATURE)
     if (DEBUGGING(LEVELING)) SERIAL_ECHOLNPGM("> endstops.enable(true)");
 
   // Enable mesh leveling again
   #if ENABLED(MESH_BED_LEVELING)
-    if (mbl.has_mesh()) {
-      #if ENABLED(DEBUG_LEVELING_FEATURE)
-        if (DEBUGGING(LEVELING)) SERIAL_ECHOLNPGM("MBL has mesh");
-      #endif
+    if (mbl.reactivate()) {
+      set_bed_leveling_enabled(true);
       if (home_all_axis || (axis_homed[X_AXIS] && axis_homed[Y_AXIS] && homeZ)) {
-        #if ENABLED(DEBUG_LEVELING_FEATURE)
-          if (DEBUGGING(LEVELING)) SERIAL_ECHOLNPGM("MBL Z homing");
-        #endif
-        current_position[Z_AXIS] = MESH_HOME_SEARCH_Z
-          #if Z_HOME_DIR > 0
-            + Z_MAX_POS
-          #endif
-        ;
-        SYNC_PLAN_POSITION_KINEMATIC();
-        mbl.set_active(true);
         #if ENABLED(MESH_G28_REST_ORIGIN)
-          current_position[Z_AXIS] = 0.0;
+          current_position[Z_AXIS] = LOGICAL_Z_POSITION(Z_MIN_POS);
           set_destination_to_current();
           line_to_destination(homing_feedrate_mm_s[Z_AXIS]);
           stepper.synchronize();
-          #if ENABLED(DEBUG_LEVELING_FEATURE)
-            if (DEBUGGING(LEVELING)) DEBUG_POS("MBL Rest Origin", current_position);
-          #endif
-        #else
-          planner.unapply_leveling(current_position);
-          #if ENABLED(DEBUG_LEVELING_FEATURE)
-            if (DEBUGGING(LEVELING)) DEBUG_POS("MBL adjusted MESH_HOME_SEARCH_Z", current_position);
-          #endif
-        #endif
-      }
-      else if ((axis_homed[X_AXIS] && axis_homed[Y_AXIS] && axis_homed[Z_AXIS]) && (homeX || homeY)) {
-        current_position[Z_AXIS] = pre_home_z;
-        SYNC_PLAN_POSITION_KINEMATIC();
-        mbl.set_active(true);
-        planner.unapply_leveling(current_position);
-        #if ENABLED(DEBUG_LEVELING_FEATURE)
-          if (DEBUGGING(LEVELING)) DEBUG_POS("MBL Home X or Y", current_position);
         #endif
       }
     }
 
   clean_up_after_endstop_or_probe_move();
 
-  #if ENABLED(DEBUG_LEVELING_FEATURE)
-    if (DEBUGGING(LEVELING)) SERIAL_ECHOLNPGM("<<< gcode_G28");
-  #endif
-
   // Restore the active tool after homing
   #if HOTENDS > 1
     tool_change(old_tool_index, 0, true);
   #endif
 
   report_current_position();
+
+  #if ENABLED(DEBUG_LEVELING_FEATURE)
+    if (DEBUGGING(LEVELING)) SERIAL_ECHOLNPGM("<<< gcode_G28");
+  #endif
 }
 
 #if HAS_PROBING_PROCEDURE
 
   inline void _mbl_goto_xy(const float &x, const float &y) {
     const float old_feedrate_mm_s = feedrate_mm_s;
-    feedrate_mm_s = homing_feedrate_mm_s[Z_AXIS];
 
-    current_position[Z_AXIS] = MESH_HOME_SEARCH_Z
-      #if Z_CLEARANCE_BETWEEN_PROBES > Z_HOMING_HEIGHT
-        + Z_CLEARANCE_BETWEEN_PROBES
-      #elif Z_HOMING_HEIGHT > 0
-        + Z_HOMING_HEIGHT
-      #endif
-    ;
-    line_to_current_position();
+    #if MANUAL_PROBE_HEIGHT > 0
+      feedrate_mm_s = homing_feedrate_mm_s[Z_AXIS];
+      current_position[Z_AXIS] = LOGICAL_Z_POSITION(Z_MIN_POS) + MANUAL_PROBE_HEIGHT;
+      line_to_current_position();
+    #endif
 
     feedrate_mm_s = MMM_TO_MMS(XY_PROBE_SPEED);
     current_position[X_AXIS] = LOGICAL_X_POSITION(x);
     current_position[Y_AXIS] = LOGICAL_Y_POSITION(y);
     line_to_current_position();
 
-    #if Z_CLEARANCE_BETWEEN_PROBES > 0 || Z_HOMING_HEIGHT > 0
+    #if MANUAL_PROBE_HEIGHT > 0
       feedrate_mm_s = homing_feedrate_mm_s[Z_AXIS];
-      current_position[Z_AXIS] = LOGICAL_Z_POSITION(MESH_HOME_SEARCH_Z);
+      current_position[Z_AXIS] = LOGICAL_Z_POSITION(Z_MIN_POS) + 0.2; // just slightly over the bed
       line_to_current_position();
     #endif
 
 
   void mbl_mesh_report() {
     SERIAL_PROTOCOLLNPGM("Num X,Y: " STRINGIFY(MESH_NUM_X_POINTS) "," STRINGIFY(MESH_NUM_Y_POINTS));
-    SERIAL_PROTOCOLLNPGM("Z search height: " STRINGIFY(MESH_HOME_SEARCH_Z));
     SERIAL_PROTOCOLPGM("Z offset: "); SERIAL_PROTOCOL_F(mbl.z_offset, 5);
     SERIAL_PROTOCOLLNPGM("\nMeasured points:");
     for (uint8_t py = 0; py < MESH_NUM_Y_POINTS; py++) {
   inline void gcode_G29() {
 
     static int probe_index = -1;
+    #if ENABLED(min_software_endstops) || ENABLED(max_software_endstops)
+      static bool enable_soft_endstops;
+    #endif
+
     const MeshLevelingState state = code_seen('S') ? (MeshLevelingState)code_value_byte() : MeshReport;
     if (state < 0 || state > 5) {
       SERIAL_PROTOCOLLNPGM("S out of range (0-5).");
         }
         // For each G29 S2...
         if (probe_index == 0) {
-          // For the initial G29 S2 make Z a positive value (e.g., 4.0)
-          current_position[Z_AXIS] = MESH_HOME_SEARCH_Z
-            #if Z_HOME_DIR > 0
-              + Z_MAX_POS
-            #endif
-          ;
-          SYNC_PLAN_POSITION_KINEMATIC();
+          #if ENABLED(min_software_endstops) || ENABLED(max_software_endstops)
+            // For the initial G29 S2 save software endstop state
+            enable_soft_endstops = soft_endstops_enabled;
+          #endif
         }
         else {
           // For G29 S2 after adjusting Z.
           mbl.set_zigzag_z(probe_index - 1, current_position[Z_AXIS]);
+          #if ENABLED(min_software_endstops) || ENABLED(max_software_endstops)
+            soft_endstops_enabled = enable_soft_endstops;
+          #endif
         }
         // If there's another point to sample, move there with optional lift.
         if (probe_index < (MESH_NUM_X_POINTS) * (MESH_NUM_Y_POINTS)) {
           mbl.zigzag(probe_index, px, py);
           _mbl_goto_xy(mbl.get_probe_x(px), mbl.get_probe_y(py));
+
+          #if ENABLED(min_software_endstops) || ENABLED(max_software_endstops)
+            // Disable software endstops to allow manual adjustment
+            // If G29 is not completed, they will not be re-enabled
+            soft_endstops_enabled = false;
+          #endif
+
           probe_index++;
         }
         else {
           // One last "return to the bed" (as originally coded) at completion
-          current_position[Z_AXIS] = MESH_HOME_SEARCH_Z
-            #if Z_CLEARANCE_BETWEEN_PROBES > Z_HOMING_HEIGHT
-              + Z_CLEARANCE_BETWEEN_PROBES
-            #elif Z_HOMING_HEIGHT > 0
-              + Z_HOMING_HEIGHT
-            #endif
-          ;
+          current_position[Z_AXIS] = LOGICAL_Z_POSITION(Z_MIN_POS) + MANUAL_PROBE_HEIGHT;
           line_to_current_position();
           stepper.synchronize();
 
           SERIAL_PROTOCOLLNPGM("Mesh probing done.");
           probe_index = -1;
           mbl.set_has_mesh(true);
+          mbl.set_reactivate(true);
           enqueue_and_echo_commands_P(PSTR("G28"));
+          #if HAS_BUZZER
+            lcd_buzz(200, 659);
+            lcd_buzz(200, 698);
+          #endif
         }
         break;
 
         break;
 
       case MeshReset:
-        if (mbl.active()) {
-          current_position[Z_AXIS] -= MESH_HOME_SEARCH_Z;
-          planner.apply_leveling(current_position[X_AXIS], current_position[Y_AXIS], current_position[Z_AXIS]);
-          mbl.reset();
-          SYNC_PLAN_POSITION_KINEMATIC();
-        }
-        else
-          mbl.reset();
+        reset_bed_level();
+        break;
 
     } // switch(state)
 

Marlin/SanityCheck.h

   #error "Z_RAISE_PROBE_DEPLOY_STOW and Z_RAISE_BETWEEN_PROBINGS are now Z_CLEARANCE_DEPLOY_PROBE and Z_CLEARANCE_BETWEEN_PROBES. Please update your configuration."
 #elif defined(Z_PROBE_DEPLOY_HEIGHT) || defined(Z_PROBE_TRAVEL_HEIGHT)
   #error "Z_PROBE_DEPLOY_HEIGHT and Z_PROBE_TRAVEL_HEIGHT are now Z_CLEARANCE_DEPLOY_PROBE and Z_CLEARANCE_BETWEEN_PROBES. Please update your configuration."
+#elif defined(MESH_HOME_SEARCH_Z)
+  #error "MESH_HOME_SEARCH_Z is now MANUAL_PROBE_Z_RANGE. Please update your configuration."
 #elif !defined(MIN_STEPS_PER_SEGMENT)
   #error Please replace "const int dropsegments" with "#define MIN_STEPS_PER_SEGMENT" (and increase by 1) in Configuration_adv.h.
 #elif defined(PREVENT_DANGEROUS_EXTRUDE)

Marlin/enum.h

   };
 #endif
 
-#if ENABLED(MESH_BED_LEVELING)
-  enum MeshLevelingState {
-    MeshReport,
-    MeshStart,
-    MeshNext,
-    MeshSet,
-    MeshSetZOffset,
-    MeshReset
-  };
-
-  enum MBLStatus {
-    MBL_STATUS_NONE = 0,
-    MBL_STATUS_HAS_MESH_BIT = 0,
-    MBL_STATUS_ACTIVE_BIT = 1
+#if ENABLED(PROBE_MANUALLY)
+  enum ABLState {
+    ABLReport,
+    ABLStart,
+    ABLNext,
+    ABLSet,
+    ABLReset
   };
 #endif
 

Marlin/example_configurations/Cartesio/Configuration.h

   #define MESH_INSET 10        // Mesh inset margin on print area
   #define MESH_NUM_X_POINTS 3  // Don't use more than 7 points per axis, implementation limited.
   #define MESH_NUM_Y_POINTS 3
-  #define MESH_HOME_SEARCH_Z 4  // Z after Home, bed somewhere below but above 0.0.
+  #define MANUAL_PROBE_Z_RANGE 4 // Z Range centered on Z_MIN_POS for LCD Z adjustment
 
-  //#define MESH_G28_REST_ORIGIN // After homing all axes ('G28' or 'G28 XYZ') rest at origin [0,0,0]
+  //#define MESH_G28_REST_ORIGIN // After homing all axes ('G28' or 'G28 XYZ') rest Z at Z_MIN_POS
 
   //#define MANUAL_BED_LEVELING  // Add display menu option for bed leveling.
 

Marlin/example_configurations/Felix/Configuration.h

   #define MESH_INSET 10        // Mesh inset margin on print area
   #define MESH_NUM_X_POINTS 3  // Don't use more than 7 points per axis, implementation limited.
   #define MESH_NUM_Y_POINTS 3
-  #define MESH_HOME_SEARCH_Z 4  // Z after Home, bed somewhere below but above 0.0.
+  #define MANUAL_PROBE_Z_RANGE 4 // Z Range centered on Z_MIN_POS for LCD Z adjustment
 
-  //#define MESH_G28_REST_ORIGIN // After homing all axes ('G28' or 'G28 XYZ') rest at origin [0,0,0]
+  //#define MESH_G28_REST_ORIGIN // After homing all axes ('G28' or 'G28 XYZ') rest Z at Z_MIN_POS
 
   //#define MANUAL_BED_LEVELING  // Add display menu option for bed leveling.
 

Marlin/example_configurations/Felix/DUAL/Configuration.h

   #define MESH_INSET 10        // Mesh inset margin on print area
   #define MESH_NUM_X_POINTS 3  // Don't use more than 7 points per axis, implementation limited.
   #define MESH_NUM_Y_POINTS 3
-  #define MESH_HOME_SEARCH_Z 4  // Z after Home, bed somewhere below but above 0.0.
+  #define MANUAL_PROBE_Z_RANGE 4 // Z Range centered on Z_MIN_POS for LCD Z adjustment
 
-  //#define MESH_G28_REST_ORIGIN // After homing all axes ('G28' or 'G28 XYZ') rest at origin [0,0,0]
+  //#define MESH_G28_REST_ORIGIN // After homing all axes ('G28' or 'G28 XYZ') rest Z at Z_MIN_POS
 
   //#define MANUAL_BED_LEVELING  // Add display menu option for bed leveling.
 

Marlin/example_configurations/Hephestos/Configuration.h

   #define MESH_INSET 10        // Mesh inset margin on print area
   #define MESH_NUM_X_POINTS 3  // Don't use more than 7 points per axis, implementation limited.
   #define MESH_NUM_Y_POINTS 3
-  #define MESH_HOME_SEARCH_Z 4  // Z after Home, bed somewhere below but above 0.0.
+  #define MANUAL_PROBE_Z_RANGE 4 // Z Range centered on Z_MIN_POS for LCD Z adjustment
 
-  //#define MESH_G28_REST_ORIGIN // After homing all axes ('G28' or 'G28 XYZ') rest at origin [0,0,0]
+  //#define MESH_G28_REST_ORIGIN // After homing all axes ('G28' or 'G28 XYZ') rest Z at Z_MIN_POS
 
   //#define MANUAL_BED_LEVELING  // Add display menu option for bed leveling.
 

Marlin/example_configurations/Hephestos_2/Configuration.h

   #define MESH_INSET 10        // Mesh inset margin on print area
   #define MESH_NUM_X_POINTS 3  // Don't use more than 7 points per axis, implementation limited.
   #define MESH_NUM_Y_POINTS 3
-  #define MESH_HOME_SEARCH_Z 4  // Z after Home, bed somewhere below but above 0.0.
+  #define MANUAL_PROBE_Z_RANGE 4 // Z Range centered on Z_MIN_POS for LCD Z adjustment
 
-  //#define MESH_G28_REST_ORIGIN // After homing all axes ('G28' or 'G28 XYZ') rest at origin [0,0,0]
+  //#define MESH_G28_REST_ORIGIN // After homing all axes ('G28' or 'G28 XYZ') rest Z at Z_MIN_POS
 
   //#define MANUAL_BED_LEVELING  // Add display menu option for bed leveling.
 

Marlin/example_configurations/K8200/Configuration.h

   #define MESH_INSET 10        // Mesh inset margin on print area
   #define MESH_NUM_X_POINTS 3  // Don't use more than 7 points per axis, implementation limited.
   #define MESH_NUM_Y_POINTS 3
-  #define MESH_HOME_SEARCH_Z 4  // Z after Home, bed somewhere below but above 0.0.
+  #define MANUAL_PROBE_Z_RANGE 4 // Z Range centered on Z_MIN_POS for LCD Z adjustment
 
-  //#define MESH_G28_REST_ORIGIN // After homing all axes ('G28' or 'G28 XYZ') rest at origin [0,0,0]
+  //#define MESH_G28_REST_ORIGIN // After homing all axes ('G28' or 'G28 XYZ') rest Z at Z_MIN_POS
 
   //#define MANUAL_BED_LEVELING  // Add display menu option for bed leveling.
 

Marlin/example_configurations/K8400/Configuration.h

   #define MESH_INSET 10        // Mesh inset margin on print area
   #define MESH_NUM_X_POINTS 3  // Don't use more than 7 points per axis, implementation limited.
   #define MESH_NUM_Y_POINTS 3
-  #define MESH_HOME_SEARCH_Z 4  // Z after Home, bed somewhere below but above 0.0.
+  #define MANUAL_PROBE_Z_RANGE 4 // Z Range centered on Z_MIN_POS for LCD Z adjustment
 
-  //#define MESH_G28_REST_ORIGIN // After homing all axes ('G28' or 'G28 XYZ') rest at origin [0,0,0]
+  //#define MESH_G28_REST_ORIGIN // After homing all axes ('G28' or 'G28 XYZ') rest Z at Z_MIN_POS
 
   //#define MANUAL_BED_LEVELING  // Add display menu option for bed leveling.
 

Marlin/example_configurations/K8400/Dual-head/Configuration.h

   #define MESH_INSET 10        // Mesh inset margin on print area
   #define MESH_NUM_X_POINTS 3  // Don't use more than 7 points per axis, implementation limited.
   #define MESH_NUM_Y_POINTS 3
-  #define MESH_HOME_SEARCH_Z 4  // Z after Home, bed somewhere below but above 0.0.
+  #define MANUAL_PROBE_Z_RANGE 4 // Z Range centered on Z_MIN_POS for LCD Z adjustment
 
-  //#define MESH_G28_REST_ORIGIN // After homing all axes ('G28' or 'G28 XYZ') rest at origin [0,0,0]
+  //#define MESH_G28_REST_ORIGIN // After homing all axes ('G28' or 'G28 XYZ') rest Z at Z_MIN_POS
 
   //#define MANUAL_BED_LEVELING  // Add display menu option for bed leveling.
 

Marlin/example_configurations/RepRapWorld/Megatronics/Configuration.h

   #define MESH_INSET 10        // Mesh inset margin on print area
   #define MESH_NUM_X_POINTS 3  // Don't use more than 7 points per axis, implementation limited.
   #define MESH_NUM_Y_POINTS 3
-  #define MESH_HOME_SEARCH_Z 4  // Z after Home, bed somewhere below but above 0.0.
+  #define MANUAL_PROBE_Z_RANGE 4 // Z Range centered on Z_MIN_POS for LCD Z adjustment
 
-  //#define MESH_G28_REST_ORIGIN // After homing all axes ('G28' or 'G28 XYZ') rest at origin [0,0,0]
+  //#define MESH_G28_REST_ORIGIN // After homing all axes ('G28' or 'G28 XYZ') rest Z at Z_MIN_POS
 
   //#define MANUAL_BED_LEVELING  // Add display menu option for bed leveling.
 

Marlin/example_configurations/RigidBot/Configuration.h

   #define MESH_INSET 10        // Mesh inset margin on print area
   #define MESH_NUM_X_POINTS 3  // Don't use more than 7 points per axis, implementation limited.
   #define MESH_NUM_Y_POINTS 3
-  #define MESH_HOME_SEARCH_Z 4  // Z after Home, bed somewhere below but above 0.0.
+  #define MANUAL_PROBE_Z_RANGE 4 // Z Range centered on Z_MIN_POS for LCD Z adjustment
 
-  //#define MESH_G28_REST_ORIGIN // After homing all axes ('G28' or 'G28 XYZ') rest at origin [0,0,0]
+  //#define MESH_G28_REST_ORIGIN // After homing all axes ('G28' or 'G28 XYZ') rest Z at Z_MIN_POS
 
   //#define MANUAL_BED_LEVELING  // Add display menu option for bed leveling.
 

Marlin/example_configurations/SCARA/Configuration.h

   #define MESH_INSET 10        // Mesh inset margin on print area
   #define MESH_NUM_X_POINTS 3  // Don't use more than 7 points per axis, implementation limited.
   #define MESH_NUM_Y_POINTS 3
-  #define MESH_HOME_SEARCH_Z 4  // Z after Home, bed somewhere below but above 0.0.
+  #define MANUAL_PROBE_Z_RANGE 4 // Z Range centered on Z_MIN_POS for LCD Z adjustment
 
-  //#define MESH_G28_REST_ORIGIN // After homing all axes ('G28' or 'G28 XYZ') rest at origin [0,0,0]
+  //#define MESH_G28_REST_ORIGIN // After homing all axes ('G28' or 'G28 XYZ') rest Z at Z_MIN_POS
 
   //#define MANUAL_BED_LEVELING  // Add display menu option for bed leveling.
 

Marlin/example_configurations/TAZ4/Configuration.h

   #define MESH_INSET 10        // Mesh inset margin on print area
   #define MESH_NUM_X_POINTS 3  // Don't use more than 7 points per axis, implementation limited.
   #define MESH_NUM_Y_POINTS 3
-  #define MESH_HOME_SEARCH_Z 4  // Z after Home, bed somewhere below but above 0.0.
+  #define MANUAL_PROBE_Z_RANGE 4 // Z Range centered on Z_MIN_POS for LCD Z adjustment
 
-  //#define MESH_G28_REST_ORIGIN // After homing all axes ('G28' or 'G28 XYZ') rest at origin [0,0,0]
+  //#define MESH_G28_REST_ORIGIN // After homing all axes ('G28' or 'G28 XYZ') rest Z at Z_MIN_POS
 
   //#define MANUAL_BED_LEVELING  // Add display menu option for bed leveling.
 

Marlin/example_configurations/WITBOX/Configuration.h

   #define MESH_INSET 10        // Mesh inset margin on print area
   #define MESH_NUM_X_POINTS 3  // Don't use more than 7 points per axis, implementation limited.
   #define MESH_NUM_Y_POINTS 3
-  #define MESH_HOME_SEARCH_Z 4  // Z after Home, bed somewhere below but above 0.0.
+  #define MANUAL_PROBE_Z_RANGE 4 // Z Range centered on Z_MIN_POS for LCD Z adjustment
 
-  //#define MESH_G28_REST_ORIGIN // After homing all axes ('G28' or 'G28 XYZ') rest at origin [0,0,0]
+  //#define MESH_G28_REST_ORIGIN // After homing all axes ('G28' or 'G28 XYZ') rest Z at Z_MIN_POS
 
   //#define MANUAL_BED_LEVELING  // Add display menu option for bed leveling.
 

Marlin/example_configurations/adafruit/ST7565/Configuration.h

   #define MESH_INSET 10        // Mesh inset margin on print area
   #define MESH_NUM_X_POINTS 3  // Don't use more than 7 points per axis, implementation limited.
   #define MESH_NUM_Y_POINTS 3
-  #define MESH_HOME_SEARCH_Z 4  // Z after Home, bed somewhere below but above 0.0.
+  #define MANUAL_PROBE_Z_RANGE 4 // Z Range centered on Z_MIN_POS for LCD Z adjustment
 
-  //#define MESH_G28_REST_ORIGIN // After homing all axes ('G28' or 'G28 XYZ') rest at origin [0,0,0]
+  //#define MESH_G28_REST_ORIGIN // After homing all axes ('G28' or 'G28 XYZ') rest Z at Z_MIN_POS
 
   //#define MANUAL_BED_LEVELING  // Add display menu option for bed leveling.
 

Marlin/example_configurations/delta/flsun_kossel_mini/Configuration.h

   #define MESH_INSET 10        // Mesh inset margin on print area
   #define MESH_NUM_X_POINTS 3  // Don't use more than 7 points per axis, implementation limited.
   #define MESH_NUM_Y_POINTS 3
-  #define MESH_HOME_SEARCH_Z 4  // Z after Home, bed somewhere below but above 0.0.
+  #define MANUAL_PROBE_Z_RANGE 4 // Z Range centered on Z_MIN_POS for LCD Z adjustment
 
-  //#define MESH_G28_REST_ORIGIN // After homing all axes ('G28' or 'G28 XYZ') rest at origin [0,0,0]
+  //#define MESH_G28_REST_ORIGIN // After homing all axes ('G28' or 'G28 XYZ') rest Z at Z_MIN_POS
 
   //#define MANUAL_BED_LEVELING  // Add display menu option for bed leveling.
 

Marlin/example_configurations/delta/generic/Configuration.h

   #define MESH_INSET 10        // Mesh inset margin on print area
   #define MESH_NUM_X_POINTS 3  // Don't use more than 7 points per axis, implementation limited.
   #define MESH_NUM_Y_POINTS 3
-  #define MESH_HOME_SEARCH_Z 4  // Z after Home, bed somewhere below but above 0.0.
+  #define MANUAL_PROBE_Z_RANGE 4 // Z Range centered on Z_MIN_POS for LCD Z adjustment
 
-  //#define MESH_G28_REST_ORIGIN // After homing all axes ('G28' or 'G28 XYZ') rest at origin [0,0,0]
+  //#define MESH_G28_REST_ORIGIN // After homing all axes ('G28' or 'G28 XYZ') rest Z at Z_MIN_POS
 
   //#define MANUAL_BED_LEVELING  // Add display menu option for bed leveling.
 

Marlin/example_configurations/delta/kossel_mini/Configuration.h

   #define MESH_INSET 10        // Mesh inset margin on print area
   #define MESH_NUM_X_POINTS 3  // Don't use more than 7 points per axis, implementation limited.
   #define MESH_NUM_Y_POINTS 3
-  #define MESH_HOME_SEARCH_Z 4  // Z after Home, bed somewhere below but above 0.0.
+  #define MANUAL_PROBE_Z_RANGE 4 // Z Range centered on Z_MIN_POS for LCD Z adjustment
 
-  //#define MESH_G28_REST_ORIGIN // After homing all axes ('G28' or 'G28 XYZ') rest at origin [0,0,0]
+  //#define MESH_G28_REST_ORIGIN // After homing all axes ('G28' or 'G28 XYZ') rest Z at Z_MIN_POS
 
   //#define MANUAL_BED_LEVELING  // Add display menu option for bed leveling.
 

Marlin/example_configurations/delta/kossel_pro/Configuration.h

   #define MESH_INSET 10        // Mesh inset margin on print area
   #define MESH_NUM_X_POINTS 3  // Don't use more than 7 points per axis, implementation limited.
   #define MESH_NUM_Y_POINTS 3
-  #define MESH_HOME_SEARCH_Z 4  // Z after Home, bed somewhere below but above 0.0.
+  #define MANUAL_PROBE_Z_RANGE 4 // Z Range centered on Z_MIN_POS for LCD Z adjustment
 
-  //#define MESH_G28_REST_ORIGIN // After homing all axes ('G28' or 'G28 XYZ') rest at origin [0,0,0]
+  //#define MESH_G28_REST_ORIGIN // After homing all axes ('G28' or 'G28 XYZ') rest Z at Z_MIN_POS
 
   //#define MANUAL_BED_LEVELING  // Add display menu option for bed leveling.
 

Marlin/example_configurations/delta/kossel_xl/Configuration.h

   #define MESH_INSET 10        // Mesh inset margin on print area
   #define MESH_NUM_X_POINTS 3  // Don't use more than 7 points per axis, implementation limited.
   #define MESH_NUM_Y_POINTS 3
-  #define MESH_HOME_SEARCH_Z 4  // Z after Home, bed somewhere below but above 0.0.
+  #define MANUAL_PROBE_Z_RANGE 4 // Z Range centered on Z_MIN_POS for LCD Z adjustment
 
-  //#define MESH_G28_REST_ORIGIN // After homing all axes ('G28' or 'G28 XYZ') rest at origin [0,0,0]
+  //#define MESH_G28_REST_ORIGIN // After homing all axes ('G28' or 'G28 XYZ') rest Z at Z_MIN_POS
 
   //#define MANUAL_BED_LEVELING  // Add display menu option for bed leveling.
 

Marlin/example_configurations/makibox/Configuration.h

   #define MESH_INSET 10        // Mesh inset margin on print area
   #define MESH_NUM_X_POINTS 3  // Don't use more than 7 points per axis, implementation limited.
   #define MESH_NUM_Y_POINTS 3
-  #define MESH_HOME_SEARCH_Z 4  // Z after Home, bed somewhere below but above 0.0.
+  #define MANUAL_PROBE_Z_RANGE 4 // Z Range centered on Z_MIN_POS for LCD Z adjustment
 
-  //#define MESH_G28_REST_ORIGIN // After homing all axes ('G28' or 'G28 XYZ') rest at origin [0,0,0]
+  //#define MESH_G28_REST_ORIGIN // After homing all axes ('G28' or 'G28 XYZ') rest Z at Z_MIN_POS
 
   //#define MANUAL_BED_LEVELING  // Add display menu option for bed leveling.
 

Marlin/example_configurations/tvrrug/Round2/Configuration.h

   #define MESH_INSET 10        // Mesh inset margin on print area
   #define MESH_NUM_X_POINTS 3  // Don't use more than 7 points per axis, implementation limited.
   #define MESH_NUM_Y_POINTS 3
-  #define MESH_HOME_SEARCH_Z 4  // Z after Home, bed somewhere below but above 0.0.
+  #define MANUAL_PROBE_Z_RANGE 4 // Z Range centered on Z_MIN_POS for LCD Z adjustment
 
-  //#define MESH_G28_REST_ORIGIN // After homing all axes ('G28' or 'G28 XYZ') rest at origin [0,0,0]
+  //#define MESH_G28_REST_ORIGIN // After homing all axes ('G28' or 'G28 XYZ') rest Z at Z_MIN_POS
 
   //#define MANUAL_BED_LEVELING  // Add display menu option for bed leveling.
 

Marlin/mesh_bed_leveling.h

 #include "Marlin.h"
 
 #if ENABLED(MESH_BED_LEVELING)
+
+  enum MeshLevelingState {
+    MeshReport,
+    MeshStart,
+    MeshNext,
+    MeshSet,
+    MeshSetZOffset,
+    MeshReset
+  };
+
+  enum MBLStatus {
+    MBL_STATUS_NONE = 0,
+    MBL_STATUS_HAS_MESH_BIT = 0,
+    MBL_STATUS_ACTIVE_BIT = 1,
+    MBL_STATUS_REACTIVATE_BIT = 2
+  };
+
   #define MESH_X_DIST ((MESH_MAX_X - (MESH_MIN_X))/(MESH_NUM_X_POINTS - 1))
   #define MESH_Y_DIST ((MESH_MAX_Y - (MESH_MIN_Y))/(MESH_NUM_Y_POINTS - 1))
 
     void set_active(const bool onOff)   { onOff ? SBI(status, MBL_STATUS_ACTIVE_BIT) : CBI(status, MBL_STATUS_ACTIVE_BIT); }
     bool has_mesh() const               { return TEST(status, MBL_STATUS_HAS_MESH_BIT); }
     void set_has_mesh(const bool onOff) { onOff ? SBI(status, MBL_STATUS_HAS_MESH_BIT) : CBI(status, MBL_STATUS_HAS_MESH_BIT); }
+    bool reactivate()                   { bool b = TEST(status, MBL_STATUS_REACTIVATE_BIT); CBI(status, MBL_STATUS_REACTIVATE_BIT); return b; }
+    void set_reactivate(const bool onOff) { onOff ? SBI(status, MBL_STATUS_REACTIVATE_BIT) : CBI(status, MBL_STATUS_REACTIVATE_BIT); }
 
     inline void zigzag(const int8_t index, int8_t &px, int8_t &py) const {
       px = index % (MESH_NUM_X_POINTS);

Marlin/ultralcd.cpp

     static uint8_t _lcd_level_bed_position;
 
     // Utility to go to the next mesh point
-    // A raise is added between points if Z_HOMING_HEIGHT is in use
-    // Note: During Manual Bed Leveling the homed Z position is MESH_HOME_SEARCH_Z
-    // Z position will be restored with the final action, a G28
-    inline void _mbl_goto_xy(float x, float y) {
+    inline void _manual_probe_xy(float x, float y) {
       if (no_reentrance) return;
-      current_position[Z_AXIS] = LOGICAL_Z_POSITION(MESH_HOME_SEARCH_Z + Z_HOMING_HEIGHT);
-      line_to_current(Z_AXIS);
+      #if MANUAL_PROBE_HEIGHT > 0
+        current_position[Z_AXIS] = LOGICAL_Z_POSITION(Z_MIN_POS) + MANUAL_PROBE_HEIGHT;
+        line_to_current(Z_AXIS);
+      #endif
       current_position[X_AXIS] = LOGICAL_X_POSITION(x);
       current_position[Y_AXIS] = LOGICAL_Y_POSITION(y);
       planner.buffer_line_kinematic(current_position, MMM_TO_MMS(XY_PROBE_SPEED), active_extruder);
-      #if Z_HOMING_HEIGHT > 0
-        current_position[Z_AXIS] = LOGICAL_Z_POSITION(MESH_HOME_SEARCH_Z);
+      #if MANUAL_PROBE_HEIGHT > 0
+        current_position[Z_AXIS] = LOGICAL_Z_POSITION(Z_MIN_POS) + 0.2;
         line_to_current(Z_AXIS);
       #endif
       lcd_synchronize();
       if (encoderPosition) {
         refresh_cmd_timeout();
         current_position[Z_AXIS] += float((int32_t)encoderPosition) * (MBL_Z_STEP);
-        NOLESS(current_position[Z_AXIS], 0);
-        NOMORE(current_position[Z_AXIS], MESH_HOME_SEARCH_Z * 2);
+        NOLESS(current_position[Z_AXIS], -(MANUAL_PROBE_Z_RANGE) * 0.5);
+        NOMORE(current_position[Z_AXIS], (MANUAL_PROBE_Z_RANGE) * 0.5);
         line_to_current(Z_AXIS);
         lcdDrawUpdate = LCDVIEW_KEEP_REDRAWING;
         encoderPosition = 0;
       }
 
-      static bool debounce_click = false;
       if (lcd_clicked) {
-        if (!debounce_click) {
-          debounce_click = true; // ignore multiple "clicks" in a row
-          mbl.set_zigzag_z(_lcd_level_bed_position++, current_position[Z_AXIS]);
-          if (_lcd_level_bed_position == (MESH_NUM_X_POINTS) * (MESH_NUM_Y_POINTS)) {
-            lcd_goto_screen(_lcd_level_bed_done);
+        mbl.set_zigzag_z(_lcd_level_bed_position++, current_position[Z_AXIS]);
+        if (_lcd_level_bed_position == (MESH_NUM_X_POINTS) * (MESH_NUM_Y_POINTS)) {
+          lcd_goto_screen(_lcd_level_bed_done);
 
-            current_position[Z_AXIS] = MESH_HOME_SEARCH_Z + Z_HOMING_HEIGHT;
+          #if MANUAL_PROBE_HEIGHT > 0
+            current_position[Z_AXIS] = LOGICAL_Z_POSITION(Z_MIN_POS) + MANUAL_PROBE_HEIGHT;
             line_to_current(Z_AXIS);
             lcd_synchronize();
+          #endif
 
-            mbl.set_has_mesh(true);
-            enqueue_and_echo_commands_P(PSTR("G28"));
-            lcd_return_to_status();
-            //LCD_MESSAGEPGM(MSG_LEVEL_BED_DONE);
-            #if HAS_BUZZER
-              lcd_buzz(200, 659);
-              lcd_buzz(200, 698);
-            #endif
-          }
-          else {
-            lcd_goto_screen(_lcd_level_goto_next_point);
-          }
+          mbl.set_has_mesh(true);
+          mbl.set_reactivate(true);
+          enqueue_and_echo_commands_P(PSTR("G28"));
+          lcd_return_to_status();
+          //LCD_MESSAGEPGM(MSG_LEVEL_BED_DONE);
+          #if HAS_BUZZER
+            lcd_buzz(200, 659);
+            lcd_buzz(200, 698);
+          #endif
+        }
+        else {
+          lcd_goto_screen(_lcd_level_goto_next_point);
         }
-      }
-      else {
-        debounce_click = false;
       }
 
 KeepDrawing:
       // Update on first display, then only on updates to Z position
       // Show message above on clicks instead
       if (lcdDrawUpdate) {
-        float v = current_position[Z_AXIS] - MESH_HOME_SEARCH_Z;
+        const float v = current_position[Z_AXIS];
         lcd_implementation_drawedit(PSTR(MSG_MOVE_Z), ftostr43sign(v + (v < 0 ? -0.0001 : 0.0001), '+'));
       }
 
       // Set the menu to display ahead of blocking call
       lcd_goto_screen(_lcd_level_bed_moving);
 
-      // _mbl_goto_xy runs the menu loop until the move is done
+      // _manual_probe_xy runs the menu loop until the move is done
       int8_t px, py;
       mbl.zigzag(_lcd_level_bed_position, px, py);
-      _mbl_goto_xy(mbl.get_probe_x(px), mbl.get_probe_y(py));
+      _manual_probe_xy(mbl.get_probe_x(px), mbl.get_probe_y(py));
 
       // After the blocking function returns, change menus
       lcd_goto_screen(_lcd_level_bed_get_z);
       if (lcdDrawUpdate) lcd_implementation_drawedit(PSTR(MSG_LEVEL_BED_WAITING));
       if (lcd_clicked) {
         _lcd_level_bed_position = 0;
-        current_position[Z_AXIS] = MESH_HOME_SEARCH_Z
-          #if Z_HOME_DIR > 0
-            + Z_MAX_POS
-          #endif
-        ;
-        planner.set_position_mm(current_position[X_AXIS], current_position[Y_AXIS], current_position[Z_AXIS], current_position[E_AXIS]);
         lcd_goto_screen(_lcd_level_goto_next_point);
       }
     }