Step-by-Step Menu addition

Marlin/language_en.h

 #ifndef MSG_UBL_Z_OFFSET_STOPPED
   #define MSG_UBL_Z_OFFSET_STOPPED            _UxGT("Z-Offset Stopped")
 #endif
+#ifndef MSG_UBL_STEP_BY_STEP_MENU
+  #define MSG_UBL_STEP_BY_STEP_MENU           _UxGT("Step-By-Step UBL")
+#endif
 
 #ifndef MSG_MOVING
   #define MSG_MOVING                          _UxGT("Moving...")

Marlin/ultralcd.cpp

     }
 
     /**
+     * UBL Step-By-Step submenu
+     */
+    void _lcd_ubl_step_by_step() {
+      START_MENU();
+      MENU_BACK(MSG_UBL_LEVEL_BED);
+      MENU_ITEM(gcode, "1 " MSG_UBL_BUILD_COLD_MESH, PSTR("G28\nG29 P1"));
+      MENU_ITEM(function, "2 " MSG_UBL_SMART_FILLIN, _lcd_ubl_smart_fillin_cmd);
+      MENU_ITEM(submenu, "3 " MSG_UBL_VALIDATE_MESH_MENU, _lcd_ubl_validate_mesh);
+      MENU_ITEM(gcode, "4 " MSG_UBL_FINE_TUNE_ALL, PSTR("G29 P4 R999 T"));
+      MENU_ITEM(submenu, "5 " MSG_UBL_VALIDATE_MESH_MENU, _lcd_ubl_validate_mesh);
+      MENU_ITEM(gcode, "6 " MSG_UBL_FINE_TUNE_ALL, PSTR("G29 P4 R999 T"));
+      MENU_ITEM(function, "7 " MSG_UBL_SAVE_MESH, _lcd_ubl_save_mesh_cmd);
+      END_MENU();
+    }
+
+    /**
      * UBL System submenu
      *
      *  Prepare
      *   - Manually Build Mesh
      *   - Activate UBL
      *   - Deactivate UBL
+     *   - Step-By-Step UBL
+     *       1 Build Cold Mesh
+     *       2 Smart Fill-in
+     *     - 3 Validate Mesh
+     *           PLA Mesh Validation
+     *           ABS Mesh Validation
+     *         - Custom Mesh Validation
+     *             Hotend Temp:
+     *             Bed Temp:
+     *             Validate Mesh
+     *       4 Fine Tune All
+     *     - 5 Validate Mesh
+     *           PLA Mesh Validation
+     *           ABS Mesh Validation
+     *         - Custom Mesh Validation
+     *             Hotend Temp:
+     *             Bed Temp:
+     *             Validate Mesh
+     *       6 Fine Tune All
+     *       7 Save Bed Mesh
      *   - Mesh Storage
      *       Memory Slot:
      *       Load Bed Mesh
       MENU_ITEM(gcode, MSG_UBL_MANUAL_MESH, PSTR("G29 I999\nG29 P2 B T0"));
       MENU_ITEM(gcode, MSG_UBL_ACTIVATE_MESH, PSTR("G29 A"));
       MENU_ITEM(gcode, MSG_UBL_DEACTIVATE_MESH, PSTR("G29 D"));
+      MENU_ITEM(submenu, MSG_UBL_STEP_BY_STEP_MENU, _lcd_ubl_step_by_step);
       MENU_ITEM(submenu, MSG_UBL_STORAGE_MESH_MENU, _lcd_ubl_storage_mesh);
       MENU_ITEM(submenu, MSG_UBL_OUTPUT_MAP, _lcd_ubl_output_map);
       MENU_ITEM(submenu, MSG_UBL_TOOLS, _lcd_ubl_tools_menu);