diff --git a/creality-ender3/Marlin-2.1.2.4/Marlin/Configuration.h b/creality-ender3/Marlin-2.1.2.4/Marlin/Configuration.h
index ae0262f..eb93ea9 100644
--- a/creality-ender3/Marlin-2.1.2.4/Marlin/Configuration.h
+++ b/creality-ender3/Marlin-2.1.2.4/Marlin/Configuration.h
@@ -1636,7 +1636,7 @@
 //#define DELAY_BEFORE_PROBING 200  // (ms) To prevent vibrations from triggering piezo sensors
 
 // Require minimum nozzle and/or bed temperature for probing
-//#define PREHEAT_BEFORE_PROBING // MBO: enable
+//#define PREHEAT_BEFORE_PROBING
 #if ENABLED(PREHEAT_BEFORE_PROBING)
   #define PROBING_NOZZLE_TEMP 150   // (°C) Only applies to E0 at this time // MBO: change from 120 to 150
   #define PROBING_BED_TEMP     60   // MBO: change from 50 to 60
@@ -1949,7 +1949,7 @@
 /**
  * Auto-leveling needs preheating
  */
-#define PREHEAT_BEFORE_LEVELING
+#define PREHEAT_BEFORE_LEVELING // MBO
 #if ENABLED(PREHEAT_BEFORE_LEVELING)
   #define LEVELING_NOZZLE_TEMP 120   // (°C) Only applies to E0 at this time
   #define LEVELING_BED_TEMP     60  //