Allow user to control Z-Height correction for off mesh movements (#9661)

Marlin/Configuration.h

   #define UBL_MESH_EDIT_MOVES_Z     // Sophisticated users prefer no movement of nozzle
   #define UBL_SAVE_ACTIVE_ON_M500   // Save the currently active mesh in the current slot on M500
 
+  //#define UBL_Z_RAISE_WHEN_OFF_MESH 2.5 // When the nozzle is off the mesh, this value is used
+                                          // as the Z-Height correction value.
 #elif ENABLED(MESH_BED_LEVELING)
 
   //===========================================================================

Marlin/src/config/default/Configuration.h

   #define UBL_MESH_EDIT_MOVES_Z     // Sophisticated users prefer no movement of nozzle
   #define UBL_SAVE_ACTIVE_ON_M500   // Save the currently active mesh in the current slot on M500
 
+  //#define UBL_Z_RAISE_WHEN_OFF_MESH 2.5 // When the nozzle is off the mesh, this value is used
+                                          // as the Z-Height correction value.
+
 #elif ENABLED(MESH_BED_LEVELING)
 
   //===========================================================================

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

   #define UBL_MESH_EDIT_MOVES_Z     // Sophisticated users prefer no movement of nozzle
   #define UBL_SAVE_ACTIVE_ON_M500   // Save the currently active mesh in the current slot on M500
 
+  //#define UBL_Z_RAISE_WHEN_OFF_MESH 2.5 // When the nozzle is off the mesh, this value is used
+                                          // as the Z-Height correction value.
+
 #elif ENABLED(MESH_BED_LEVELING)
 
   //===========================================================================

Marlin/src/config/examples/AliExpress/CL-260/Configuration.h

   #define UBL_MESH_EDIT_MOVES_Z     // Sophisticated users prefer no movement of nozzle
   #define UBL_SAVE_ACTIVE_ON_M500   // Save the currently active mesh in the current slot on M500
 
+  //#define UBL_Z_RAISE_WHEN_OFF_MESH 2.5 // When the nozzle is off the mesh, this value is used
+                                          // as the Z-Height correction value.
+
 #elif ENABLED(MESH_BED_LEVELING)
 
   //===========================================================================

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

   #define UBL_MESH_EDIT_MOVES_Z     // Sophisticated users prefer no movement of nozzle
   #define UBL_SAVE_ACTIVE_ON_M500   // Save the currently active mesh in the current slot on M500
 
+  //#define UBL_Z_RAISE_WHEN_OFF_MESH 2.5 // When the nozzle is off the mesh, this value is used
+                                          // as the Z-Height correction value.
+
 #elif ENABLED(MESH_BED_LEVELING)
 
   //===========================================================================

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

   #define UBL_MESH_EDIT_MOVES_Z     // Sophisticated users prefer no movement of nozzle
   #define UBL_SAVE_ACTIVE_ON_M500   // Save the currently active mesh in the current slot on M500
 
+  //#define UBL_Z_RAISE_WHEN_OFF_MESH 2.5 // When the nozzle is off the mesh, this value is used
+                                          // as the Z-Height correction value.
+
 #elif ENABLED(MESH_BED_LEVELING)
 
   //===========================================================================

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

   #define UBL_MESH_EDIT_MOVES_Z     // Sophisticated users prefer no movement of nozzle
   #define UBL_SAVE_ACTIVE_ON_M500   // Save the currently active mesh in the current slot on M500
 
+  //#define UBL_Z_RAISE_WHEN_OFF_MESH 2.5 // When the nozzle is off the mesh, this value is used
+                                          // as the Z-Height correction value.
+
 #elif ENABLED(MESH_BED_LEVELING)
 
   //===========================================================================

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

   #define UBL_MESH_EDIT_MOVES_Z     // Sophisticated users prefer no movement of nozzle
   #define UBL_SAVE_ACTIVE_ON_M500   // Save the currently active mesh in the current slot on M500
 
+  //#define UBL_Z_RAISE_WHEN_OFF_MESH 2.5 // When the nozzle is off the mesh, this value is used
+                                          // as the Z-Height correction value.
+
 #elif ENABLED(MESH_BED_LEVELING)
 
   //===========================================================================

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

   #define UBL_MESH_EDIT_MOVES_Z     // Sophisticated users prefer no movement of nozzle
   #define UBL_SAVE_ACTIVE_ON_M500   // Save the currently active mesh in the current slot on M500
 
+  //#define UBL_Z_RAISE_WHEN_OFF_MESH 2.5 // When the nozzle is off the mesh, this value is used
+                                          // as the Z-Height correction value.
+
 #elif ENABLED(MESH_BED_LEVELING)
 
   //===========================================================================

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

   #define UBL_MESH_EDIT_MOVES_Z     // Sophisticated users prefer no movement of nozzle
   #define UBL_SAVE_ACTIVE_ON_M500   // Save the currently active mesh in the current slot on M500
 
+  //#define UBL_Z_RAISE_WHEN_OFF_MESH 2.5 // When the nozzle is off the mesh, this value is used
+                                          // as the Z-Height correction value.
+
 #elif ENABLED(MESH_BED_LEVELING)
 
   //===========================================================================

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

   #define UBL_MESH_EDIT_MOVES_Z     // Sophisticated users prefer no movement of nozzle
   #define UBL_SAVE_ACTIVE_ON_M500   // Save the currently active mesh in the current slot on M500
 
+  //#define UBL_Z_RAISE_WHEN_OFF_MESH 2.5 // When the nozzle is off the mesh, this value is used
+                                          // as the Z-Height correction value.
+
 #elif ENABLED(MESH_BED_LEVELING)
 
   //===========================================================================

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

   #define UBL_MESH_EDIT_MOVES_Z     // Sophisticated users prefer no movement of nozzle
   #define UBL_SAVE_ACTIVE_ON_M500   // Save the currently active mesh in the current slot on M500
 
+  //#define UBL_Z_RAISE_WHEN_OFF_MESH 2.5 // When the nozzle is off the mesh, this value is used
+                                          // as the Z-Height correction value.
+
 #elif ENABLED(MESH_BED_LEVELING)
 
   //===========================================================================

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

   #define UBL_MESH_EDIT_MOVES_Z     // Sophisticated users prefer no movement of nozzle
   #define UBL_SAVE_ACTIVE_ON_M500   // Save the currently active mesh in the current slot on M500
 
+  //#define UBL_Z_RAISE_WHEN_OFF_MESH 2.5 // When the nozzle is off the mesh, this value is used
+                                          // as the Z-Height correction value.
+
 #elif ENABLED(MESH_BED_LEVELING)
 
   //===========================================================================

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

   #define UBL_PROBE_PT_1_X 39       // Probing points for 3-Point leveling of the mesh
   #define UBL_PROBE_PT_1_Y 180
   #define UBL_PROBE_PT_2_X 39
+
+  //#define UBL_Z_RAISE_WHEN_OFF_MESH 2.5 // When the nozzle is off the mesh, this value is used
+                                          // as the Z-Height correction value.
   #define UBL_PROBE_PT_2_Y 20
   #define UBL_PROBE_PT_3_X 180
   #define UBL_PROBE_PT_3_Y 20

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

   #define UBL_MESH_EDIT_MOVES_Z     // Sophisticated users prefer no movement of nozzle
   #define UBL_SAVE_ACTIVE_ON_M500   // Save the currently active mesh in the current slot on M500
 
+  //#define UBL_Z_RAISE_WHEN_OFF_MESH 2.5 // When the nozzle is off the mesh, this value is used
+                                          // as the Z-Height correction value.
+
 #elif ENABLED(MESH_BED_LEVELING)
 
   //===========================================================================

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

   #define UBL_MESH_EDIT_MOVES_Z     // Sophisticated users prefer no movement of nozzle
   #define UBL_SAVE_ACTIVE_ON_M500   // Save the currently active mesh in the current slot on M500
 
+  //#define UBL_Z_RAISE_WHEN_OFF_MESH 2.5 // When the nozzle is off the mesh, this value is used
+                                          // as the Z-Height correction value.
+
 #elif ENABLED(MESH_BED_LEVELING)
 
   //===========================================================================

Marlin/src/config/examples/Felix/DUAL/Configuration.h

   #define UBL_MESH_EDIT_MOVES_Z     // Sophisticated users prefer no movement of nozzle
   #define UBL_SAVE_ACTIVE_ON_M500   // Save the currently active mesh in the current slot on M500
 
+  //#define UBL_Z_RAISE_WHEN_OFF_MESH 2.5 // When the nozzle is off the mesh, this value is used
+                                          // as the Z-Height correction value.
+
 #elif ENABLED(MESH_BED_LEVELING)
 
   //===========================================================================

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

   #define UBL_MESH_EDIT_MOVES_Z     // Sophisticated users prefer no movement of nozzle
   #define UBL_SAVE_ACTIVE_ON_M500   // Save the currently active mesh in the current slot on M500
 
+  #define UBL_Z_RAISE_WHEN_OFF_MESH 2.5 // When the nozzle is off the mesh, this value is used
+                                        // as the Z-Height correction value.
+
 #elif ENABLED(MESH_BED_LEVELING)
 
   //===========================================================================

Marlin/src/config/examples/Geeetech/GT2560/Configuration.h

   #define UBL_MESH_EDIT_MOVES_Z     // Sophisticated users prefer no movement of nozzle
   #define UBL_SAVE_ACTIVE_ON_M500   // Save the currently active mesh in the current slot on M500
 
+  //#define UBL_Z_RAISE_WHEN_OFF_MESH 2.5 // When the nozzle is off the mesh, this value is used
+                                          // as the Z-Height correction value.
+
 #elif ENABLED(MESH_BED_LEVELING)
 
   //===========================================================================

Marlin/src/config/examples/Geeetech/I3_Pro_X-GT2560/Configuration.h

   #define UBL_MESH_EDIT_MOVES_Z     // Sophisticated users prefer no movement of nozzle
   #define UBL_SAVE_ACTIVE_ON_M500   // Save the currently active mesh in the current slot on M500
 
+  //#define UBL_Z_RAISE_WHEN_OFF_MESH 2.5 // When the nozzle is off the mesh, this value is used
+                                          // as the Z-Height correction value.
+
 #elif ENABLED(MESH_BED_LEVELING)
 
   //===========================================================================

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

   #define UBL_MESH_EDIT_MOVES_Z     // Sophisticated users prefer no movement of nozzle
   #define UBL_SAVE_ACTIVE_ON_M500   // Save the currently active mesh in the current slot on M500
 
+  //#define UBL_Z_RAISE_WHEN_OFF_MESH 2.5 // When the nozzle is off the mesh, this value is used
+                                          // as the Z-Height correction value.
+
 #elif ENABLED(MESH_BED_LEVELING)
 
   //===========================================================================

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

   #define UBL_MESH_EDIT_MOVES_Z     // Sophisticated users prefer no movement of nozzle
   #define UBL_SAVE_ACTIVE_ON_M500   // Save the currently active mesh in the current slot on M500
 
+  //#define UBL_Z_RAISE_WHEN_OFF_MESH 2.5 // When the nozzle is off the mesh, this value is used
+                                          // as the Z-Height correction value.
+
 #elif ENABLED(MESH_BED_LEVELING)
 
   //===========================================================================

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

   #define UBL_MESH_EDIT_MOVES_Z     // Sophisticated users prefer no movement of nozzle
   #define UBL_SAVE_ACTIVE_ON_M500   // Save the currently active mesh in the current slot on M500
 
+  //#define UBL_Z_RAISE_WHEN_OFF_MESH 2.5 // When the nozzle is off the mesh, this value is used
+                                          // as the Z-Height correction value.
+
 #elif ENABLED(MESH_BED_LEVELING)
 
   //===========================================================================

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

   #define UBL_MESH_EDIT_MOVES_Z     // Sophisticated users prefer no movement of nozzle
   #define UBL_SAVE_ACTIVE_ON_M500   // Save the currently active mesh in the current slot on M500
 
+  //#define UBL_Z_RAISE_WHEN_OFF_MESH 2.5 // When the nozzle is off the mesh, this value is used
+                                          // as the Z-Height correction value.
+
 #elif ENABLED(MESH_BED_LEVELING)
 
   //===========================================================================

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

   #define UBL_MESH_EDIT_MOVES_Z     // Sophisticated users prefer no movement of nozzle
   #define UBL_SAVE_ACTIVE_ON_M500   // Save the currently active mesh in the current slot on M500
 
+  //#define UBL_Z_RAISE_WHEN_OFF_MESH 2.5 // When the nozzle is off the mesh, this value is used
+                                          // as the Z-Height correction value.
+
 #elif ENABLED(MESH_BED_LEVELING)
 
   //===========================================================================

Marlin/src/config/examples/Micromake/C1/basic/Configuration.h

   #define UBL_MESH_EDIT_MOVES_Z     // Sophisticated users prefer no movement of nozzle
   #define UBL_SAVE_ACTIVE_ON_M500   // Save the currently active mesh in the current slot on M500
 
+  //#define UBL_Z_RAISE_WHEN_OFF_MESH 2.5 // When the nozzle is off the mesh, this value is used
+                                          // as the Z-Height correction value.
+
 #elif ENABLED(MESH_BED_LEVELING)
 
   //===========================================================================

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

   #define UBL_MESH_EDIT_MOVES_Z     // Sophisticated users prefer no movement of nozzle
   #define UBL_SAVE_ACTIVE_ON_M500   // Save the currently active mesh in the current slot on M500
 
+  //#define UBL_Z_RAISE_WHEN_OFF_MESH 2.5 // When the nozzle is off the mesh, this value is used
+                                          // as the Z-Height correction value.
+
 #elif ENABLED(MESH_BED_LEVELING)
 
   //===========================================================================

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

   #define UBL_MESH_EDIT_MOVES_Z     // Sophisticated users prefer no movement of nozzle
   #define UBL_SAVE_ACTIVE_ON_M500   // Save the currently active mesh in the current slot on M500
 
+  //#define UBL_Z_RAISE_WHEN_OFF_MESH 2.5 // When the nozzle is off the mesh, this value is used
+                                          // as the Z-Height correction value.
+
 #elif ENABLED(MESH_BED_LEVELING)
 
   //===========================================================================

Marlin/src/config/examples/RepRapWorld/Megatronics/Configuration.h

   #define UBL_MESH_EDIT_MOVES_Z     // Sophisticated users prefer no movement of nozzle
   #define UBL_SAVE_ACTIVE_ON_M500   // Save the currently active mesh in the current slot on M500
 
+  //#define UBL_Z_RAISE_WHEN_OFF_MESH 2.5 // When the nozzle is off the mesh, this value is used
+                                          // as the Z-Height correction value.
+
 #elif ENABLED(MESH_BED_LEVELING)
 
   //===========================================================================

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

   #define UBL_MESH_EDIT_MOVES_Z     // Sophisticated users prefer no movement of nozzle
   #define UBL_SAVE_ACTIVE_ON_M500   // Save the currently active mesh in the current slot on M500
 
+  //#define UBL_Z_RAISE_WHEN_OFF_MESH 2.5 // When the nozzle is off the mesh, this value is used
+                                          // as the Z-Height correction value.
+
 #elif ENABLED(MESH_BED_LEVELING)
 
   //===========================================================================

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

   #define UBL_MESH_EDIT_MOVES_Z     // Sophisticated users prefer no movement of nozzle
   #define UBL_SAVE_ACTIVE_ON_M500   // Save the currently active mesh in the current slot on M500
 
+  //#define UBL_Z_RAISE_WHEN_OFF_MESH 2.5 // When the nozzle is off the mesh, this value is used
+                                          // as the Z-Height correction value.
+
 #elif ENABLED(MESH_BED_LEVELING)
 
   //===========================================================================

Marlin/src/config/examples/STM32F10/Configuration.h

   #define UBL_MESH_EDIT_MOVES_Z     // Sophisticated users prefer no movement of nozzle
   #define UBL_SAVE_ACTIVE_ON_M500   // Save the currently active mesh in the current slot on M500
 
+  //#define UBL_Z_RAISE_WHEN_OFF_MESH 2.5 // When the nozzle is off the mesh, this value is used
+                                          // as the Z-Height correction value.
+
 #elif ENABLED(MESH_BED_LEVELING)
 
   //===========================================================================

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

   #define UBL_MESH_EDIT_MOVES_Z     // Sophisticated users prefer no movement of nozzle
   #define UBL_SAVE_ACTIVE_ON_M500   // Save the currently active mesh in the current slot on M500
 
+  //#define UBL_Z_RAISE_WHEN_OFF_MESH 2.5 // When the nozzle is off the mesh, this value is used
+                                          // as the Z-Height correction value.
+
 #elif ENABLED(MESH_BED_LEVELING)
 
   //===========================================================================

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

   #define UBL_MESH_EDIT_MOVES_Z     // Sophisticated users prefer no movement of nozzle
   #define UBL_SAVE_ACTIVE_ON_M500   // Save the currently active mesh in the current slot on M500
 
+  //#define UBL_Z_RAISE_WHEN_OFF_MESH 2.5 // When the nozzle is off the mesh, this value is used
+                                          // as the Z-Height correction value.
+
 #elif ENABLED(MESH_BED_LEVELING)
 
   //===========================================================================

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

   #define UBL_MESH_EDIT_MOVES_Z     // Sophisticated users prefer no movement of nozzle
   #define UBL_SAVE_ACTIVE_ON_M500   // Save the currently active mesh in the current slot on M500
 
+  //#define UBL_Z_RAISE_WHEN_OFF_MESH 2.5 // When the nozzle is off the mesh, this value is used
+                                          // as the Z-Height correction value.
+
 #elif ENABLED(MESH_BED_LEVELING)
 
   //===========================================================================

Marlin/src/config/examples/Tronxy/X1/Configuration.h

   #define UBL_MESH_EDIT_MOVES_Z     // Sophisticated users prefer no movement of nozzle
   #define UBL_SAVE_ACTIVE_ON_M500   // Save the currently active mesh in the current slot on M500
 
+  //#define UBL_Z_RAISE_WHEN_OFF_MESH 2.5 // When the nozzle is off the mesh, this value is used
+                                          // as the Z-Height correction value.
+
 #elif ENABLED(MESH_BED_LEVELING)
 
   //===========================================================================

Marlin/src/config/examples/Tronxy/X5S/Configuration.h

   #define UBL_MESH_EDIT_MOVES_Z     // Sophisticated users prefer no movement of nozzle
   #define UBL_SAVE_ACTIVE_ON_M500   // Save the currently active mesh in the current slot on M500
 
+  //#define UBL_Z_RAISE_WHEN_OFF_MESH 2.5 // When the nozzle is off the mesh, this value is used
+                                          // as the Z-Height correction value.
+
 #elif ENABLED(MESH_BED_LEVELING)
 
   //===========================================================================

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

   #define UBL_MESH_EDIT_MOVES_Z     // Sophisticated users prefer no movement of nozzle
   #define UBL_SAVE_ACTIVE_ON_M500   // Save the currently active mesh in the current slot on M500
 
+  //#define UBL_Z_RAISE_WHEN_OFF_MESH 2.5 // When the nozzle is off the mesh, this value is used
+                                          // as the Z-Height correction value.
+
 #elif ENABLED(MESH_BED_LEVELING)
 
   //===========================================================================

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

   #define UBL_MESH_EDIT_MOVES_Z     // Sophisticated users prefer no movement of nozzle
   #define UBL_SAVE_ACTIVE_ON_M500   // Save the currently active mesh in the current slot on M500
 
+  //#define UBL_Z_RAISE_WHEN_OFF_MESH 2.5 // When the nozzle is off the mesh, this value is used
+                                          // as the Z-Height correction value.
+
 #elif ENABLED(MESH_BED_LEVELING)
 
   //===========================================================================

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

   #define UBL_MESH_EDIT_MOVES_Z     // Sophisticated users prefer no movement of nozzle
   #define UBL_SAVE_ACTIVE_ON_M500   // Save the currently active mesh in the current slot on M500
 
+  //#define UBL_Z_RAISE_WHEN_OFF_MESH 2.5 // When the nozzle is off the mesh, this value is used
+                                          // as the Z-Height correction value.
+
 #elif ENABLED(MESH_BED_LEVELING)
 
   //===========================================================================

Marlin/src/config/examples/Velleman/K8400/Dual-head/Configuration.h

   #define UBL_MESH_EDIT_MOVES_Z     // Sophisticated users prefer no movement of nozzle
   #define UBL_SAVE_ACTIVE_ON_M500   // Save the currently active mesh in the current slot on M500
 
+  //#define UBL_Z_RAISE_WHEN_OFF_MESH 2.5 // When the nozzle is off the mesh, this value is used
+                                          // as the Z-Height correction value.
+
 #elif ENABLED(MESH_BED_LEVELING)
 
   //===========================================================================

Marlin/src/config/examples/adafruit/ST7565/Configuration.h

   #define UBL_MESH_EDIT_MOVES_Z     // Sophisticated users prefer no movement of nozzle
   #define UBL_SAVE_ACTIVE_ON_M500   // Save the currently active mesh in the current slot on M500
 
+  //#define UBL_Z_RAISE_WHEN_OFF_MESH 2.5 // When the nozzle is off the mesh, this value is used
+                                          // as the Z-Height correction value.
+
 #elif ENABLED(MESH_BED_LEVELING)
 
   //===========================================================================

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

   #define UBL_MESH_EDIT_MOVES_Z     // Sophisticated users prefer no movement of nozzle
   #define UBL_SAVE_ACTIVE_ON_M500   // Save the currently active mesh in the current slot on M500
 
+  //#define UBL_Z_RAISE_WHEN_OFF_MESH 2.5 // When the nozzle is off the mesh, this value is used
+                                          // as the Z-Height correction value.
+
 #elif ENABLED(MESH_BED_LEVELING)
 
   //===========================================================================

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

   #define UBL_MESH_EDIT_MOVES_Z     // Sophisticated users prefer no movement of nozzle
   #define UBL_SAVE_ACTIVE_ON_M500   // Save the currently active mesh in the current slot on M500
 
+  //#define UBL_Z_RAISE_WHEN_OFF_MESH 2.5 // When the nozzle is off the mesh, this value is used
+                                          // as the Z-Height correction value.
+
 #elif ENABLED(MESH_BED_LEVELING)
 
   //===========================================================================

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

   #define UBL_MESH_EDIT_MOVES_Z     // Sophisticated users prefer no movement of nozzle
   #define UBL_SAVE_ACTIVE_ON_M500   // Save the currently active mesh in the current slot on M500
 
+  //#define UBL_Z_RAISE_WHEN_OFF_MESH 2.5 // When the nozzle is off the mesh, this value is used
+                                          // as the Z-Height correction value.
+
 #elif ENABLED(MESH_BED_LEVELING)
 
   //===========================================================================

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

   #define UBL_MESH_EDIT_MOVES_Z     // Sophisticated users prefer no movement of nozzle
   #define UBL_SAVE_ACTIVE_ON_M500   // Save the currently active mesh in the current slot on M500
 
+  //#define UBL_Z_RAISE_WHEN_OFF_MESH 2.5 // When the nozzle is off the mesh, this value is used
+                                          // as the Z-Height correction value.
+
 #elif ENABLED(MESH_BED_LEVELING)
 
   //===========================================================================

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

   #define UBL_MESH_EDIT_MOVES_Z     // Sophisticated users prefer no movement of nozzle
   #define UBL_SAVE_ACTIVE_ON_M500   // Save the currently active mesh in the current slot on M500
 
+  //#define UBL_Z_RAISE_WHEN_OFF_MESH 2.5 // When the nozzle is off the mesh, this value is used
+                                          // as the Z-Height correction value.
+
 #elif ENABLED(MESH_BED_LEVELING)
 
   //===========================================================================

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

   #define UBL_MESH_EDIT_MOVES_Z     // Sophisticated users prefer no movement of nozzle
   #define UBL_SAVE_ACTIVE_ON_M500   // Save the currently active mesh in the current slot on M500
 
+  //#define UBL_Z_RAISE_WHEN_OFF_MESH 2.5 // When the nozzle is off the mesh, this value is used
+                                          // as the Z-Height correction value.
+
 #elif ENABLED(MESH_BED_LEVELING)
 
   //===========================================================================

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

   #define UBL_MESH_EDIT_MOVES_Z     // Sophisticated users prefer no movement of nozzle
   #define UBL_SAVE_ACTIVE_ON_M500   // Save the currently active mesh in the current slot on M500
 
+  //#define UBL_Z_RAISE_WHEN_OFF_MESH 2.5 // When the nozzle is off the mesh, this value is used
+                                          // as the Z-Height correction value.
+
 #elif ENABLED(MESH_BED_LEVELING)
 
   //===========================================================================

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

   #define UBL_MESH_EDIT_MOVES_Z     // Sophisticated users prefer no movement of nozzle
   #define UBL_SAVE_ACTIVE_ON_M500   // Save the currently active mesh in the current slot on M500
 
+  //#define UBL_Z_RAISE_WHEN_OFF_MESH 2.5 // When the nozzle is off the mesh, this value is used
+                                          // as the Z-Height correction value.
+
 #elif ENABLED(MESH_BED_LEVELING)
 
   //===========================================================================

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

   #define UBL_MESH_EDIT_MOVES_Z     // Sophisticated users prefer no movement of nozzle
   #define UBL_SAVE_ACTIVE_ON_M500   // Save the currently active mesh in the current slot on M500
 
+  //#define UBL_Z_RAISE_WHEN_OFF_MESH 2.5 // When the nozzle is off the mesh, this value is used
+                                          // as the Z-Height correction value.
+
 #elif ENABLED(MESH_BED_LEVELING)
 
   //===========================================================================

Marlin/src/config/examples/stm32f103ret6/Configuration.h

   #define UBL_MESH_EDIT_MOVES_Z     // Sophisticated users prefer no movement of nozzle
   #define UBL_SAVE_ACTIVE_ON_M500   // Save the currently active mesh in the current slot on M500
 
+  //#define UBL_Z_RAISE_WHEN_OFF_MESH 2.5 // When the nozzle is off the mesh, this value is used
+                                          // as the Z-Height correction value.
+
 #elif ENABLED(MESH_BED_LEVELING)
 
   //===========================================================================

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

   #define UBL_MESH_EDIT_MOVES_Z     // Sophisticated users prefer no movement of nozzle
   #define UBL_SAVE_ACTIVE_ON_M500   // Save the currently active mesh in the current slot on M500
 
+  //#define UBL_Z_RAISE_WHEN_OFF_MESH 2.5 // When the nozzle is off the mesh, this value is used
+                                          // as the Z-Height correction value.
+
 #elif ENABLED(MESH_BED_LEVELING)
 
   //===========================================================================

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

   #define UBL_MESH_EDIT_MOVES_Z     // Sophisticated users prefer no movement of nozzle
   #define UBL_SAVE_ACTIVE_ON_M500   // Save the currently active mesh in the current slot on M500
 
+  //#define UBL_Z_RAISE_WHEN_OFF_MESH 2.5 // When the nozzle is off the mesh, this value is used
+                                          // as the Z-Height correction value.
+
 #elif ENABLED(MESH_BED_LEVELING)
 
   //===========================================================================

Marlin/src/feature/bedlevel/ubl/ubl.h

             SERIAL_EOL();
           }
         #endif
-        return NAN;
+
+        /**
+         * The requested location is off the mesh.  Check if UBL_Z_RAISE_WHEN_OFF_MESH
+         * is specified. If so, that value is returned.
+         */
+        #if ENABLED(UBL_Z_RAISE_WHEN_OFF_MESH)
+          return UBL_Z_RAISE_WHEN_OFF_MESH;
+        #else
+          return NAN;
+        #endif
       }
 
       const float xratio = (rx0 - mesh_index_to_xpos(x1_i)) * (1.0 / (MESH_X_DIST)),
             SERIAL_EOL();
           }
         #endif
-        return NAN;
+
+        /**
+         * The requested location is off the mesh.  Check if UBL_Z_RAISE_WHEN_OFF_MESH
+         * is specified. If so, that value is returned.
+         */
+        #if ENABLED(UBL_Z_RAISE_WHEN_OFF_MESH)
+          return UBL_Z_RAISE_WHEN_OFF_MESH;
+        #else
+          return NAN;
+        #endif
       }
 
       const float yratio = (ry0 - mesh_index_to_ypos(y1_i)) * (1.0 / (MESH_Y_DIST)),
       const int8_t cx = get_cell_index_x(rx0),
                    cy = get_cell_index_y(ry0); // return values are clamped
 
+      /**
+       * Check if the requested location is off the mesh.  If so, and
+       * UBL_Z_RAISE_WHEN_OFF_MESH is specified, that value is returned.
+       */
+      #if ENABLED(UBL_Z_RAISE_WHEN_OFF_MESH)
+        if (!WITHIN(rx0, 0, GRID_MAX_POINTS_X - 1) || !WITHIN(ry0, 0, GRID_MAX_POINTS_Y - 1))
+          return UBL_Z_RAISE_WHEN_OFF_MESHH;
+      #endif
+
       const float z1 = calc_z0(rx0,
                                mesh_index_to_xpos(cx), z_values[cx][cy],
                                mesh_index_to_xpos(cx + 1), z_values[min(cx, GRID_MAX_POINTS_X - 2) + 1][cy]);

Marlin/src/feature/bedlevel/ubl/ubl_motion.cpp

       if (!WITHIN(cell_dest_xi, 0, GRID_MAX_POINTS_X - 1) || !WITHIN(cell_dest_yi, 0, GRID_MAX_POINTS_Y - 1)) {
 
         // Note: There is no Z Correction in this case. We are off the grid and don't know what
-        // a reasonable correction would be.
-
-        planner.buffer_segment(end[X_AXIS], end[Y_AXIS], end[Z_AXIS], end[E_AXIS], feed_rate, extruder);
+        // a reasonable correction would be.  If the user has specified a UBL_Z_RAISE_WHEN_OFF_MESH 
+        // value, that will be used instead of a calculated (Bi-Linear interpolation) correction.
+
+        float z_raise = 0.0;
+        #if ENABLED(UBL_Z_RAISE_WHEN_OFF_MESH)
+          z_raise = UBL_Z_RAISE_WHEN_OFF_MESH;
+        #endif
+        planner.buffer_segment(end[X_AXIS], end[Y_AXIS], end[Z_AXIS] + z_raise, end[E_AXIS], feed_rate, extruder);
         set_current_from_destination();
 
         if (g26_debug_flag)