Merge pull request #6976 from Tannoo/Leveling_in_About_Printer

Leveling type in About Printer

Marlin/language_en.h

 #ifndef MSG_INFO_PRINTER_MENU
   #define MSG_INFO_PRINTER_MENU               _UxGT("Printer Info")
 #endif
+#ifndef MSG_3POINT_LEVELING
+  #define MSG_3POINT_LEVELING                 _UxGT("3-Point Leveling")
+#endif
+#ifndef MSG_LINEAR_LEVELING
+  #define MSG_LINEAR_LEVELING                 _UxGT("Linear Leveling")
+#endif
+#ifndef MSG_BILINEAR_LEVELING
+  #define MSG_BILINEAR_LEVELING               _UxGT("Bilinear Leveling")
+#endif
+#ifndef MSG_UBL_LEVELING
+  #define MSG_UBL_LEVELING                    _UxGT("Unified Bed Leveling")
+#endif
+#ifndef MSG_MESH_LEVELING
+  #define MSG_MESH_LEVELING                   _UxGT("Mesh Leveling")
+#endif
 #ifndef MSG_INFO_STATS_MENU
   #define MSG_INFO_STATS_MENU                 _UxGT("Printer Stats")
 #endif

Marlin/ultralcd.cpp

       STATIC_ITEM(MACHINE_NAME, true);                                 // My3DPrinter
       STATIC_ITEM(WEBSITE_URL, true);                                  // www.my3dprinter.com
       STATIC_ITEM(MSG_INFO_EXTRUDERS ": " STRINGIFY(EXTRUDERS), true); // Extruders: 2
+      #if ENABLED(AUTO_BED_LEVELING_3POINT)
+        STATIC_ITEM(MSG_3POINT_LEVELING, true);                        // 3-Point Leveling
+      #elif ENABLED(AUTO_BED_LEVELING_LINEAR)
+        STATIC_ITEM(MSG_LINEAR_LEVELING, true);                        // Linear Leveling
+      #elif ENABLED(AUTO_BED_LEVELING_BILINEAR)
+        STATIC_ITEM(MSG_BILINEAR_LEVELING, true);                      // Bi-linear Leveling
+      #elif ENABLED(AUTO_BED_LEVELING_UBL)
+        STATIC_ITEM(MSG_UBL_LEVELING, true);                           // Unified Bed Leveling
+      #elif ENABLED(MESH_BED_LEVELING)
+        STATIC_ITEM(MSG_MESH_LEVELING, true);                          // Mesh Leveling
+      #endif
       END_SCREEN();
     }