🎨 Adjust some conditionals

Marlin/src/feature/bedlevel/bedlevel.h

 #include "../../inc/MarlinConfigPre.h"
 
 #if EITHER(RESTORE_LEVELING_AFTER_G28, ENABLE_LEVELING_AFTER_G28)
-  #define G28_L0_ENSURES_LEVELING_OFF 1
+  #define CAN_SET_LEVELING_AFTER_G28 1
 #endif
 
 #if ENABLED(PROBE_MANUALLY)

Marlin/src/feature/powerloss.h

     uint8_t fan_speed[FAN_COUNT];
   #endif
 
-  #if ENABLED(HAS_LEVELING)
+  #if HAS_LEVELING
     float fade;
   #endif
 
     bool raised:1;                // Raised before saved
     bool dryrun:1;                // M111 S8
     bool allow_cold_extrusion:1;  // M302 P1
-    #if ENABLED(HAS_LEVELING)
+    #if HAS_LEVELING
       bool leveling:1;            // M420 S
     #endif
     #if DISABLED(NO_VOLUMETRICS)

Marlin/src/gcode/bedlevel/abl/G29.cpp

 
   // Send 'N' to force homing before G29 (internal only)
   if (parser.seen_test('N'))
-    process_subcommands_now_P(TERN(G28_L0_ENSURES_LEVELING_OFF, PSTR("G28L0"), G28_STR));
+    process_subcommands_now_P(TERN(CAN_SET_LEVELING_AFTER_G28, PSTR("G28L0"), G28_STR));
 
   // Don't allow auto-leveling without homing first
   if (homing_needed_error()) G29_RETURN(false);

Marlin/src/gcode/bedlevel/mbl/G29.cpp

       mbl.reset();
       mbl_probe_index = 0;
       if (!ui.wait_for_move) {
-        queue.inject_P(parser.seen_test('N') ? PSTR("G28" TERN(G28_L0_ENSURES_LEVELING_OFF, "L0", "") "\nG29S2") : PSTR("G29S2"));
+        queue.inject_P(parser.seen_test('N') ? PSTR("G28" TERN(CAN_SET_LEVELING_AFTER_G28, "L0", "") "\nG29S2") : PSTR("G29S2"));
         return;
       }
       state = MeshNext;

Marlin/src/gcode/calibrate/G28.cpp

   SET_SOFT_ENDSTOP_LOOSE(false);  // Reset a leftover 'loose' motion state
 
   // Disable the leveling matrix before homing
-  #if HAS_LEVELING
-    const bool leveling_restore_state = parser.boolval('L', TERN(RESTORE_LEVELING_AFTER_G28, planner.leveling_active, ENABLED(ENABLE_LEVELING_AFTER_G28)));
-    IF_ENABLED(PROBE_MANUALLY, g29_in_progress = false); // Cancel the active G29 session
-    set_bed_leveling_enabled(false);
+  #if CAN_SET_LEVELING_AFTER_G28
+    const bool leveling_restore_state = parser.boolval('L', TERN1(RESTORE_LEVELING_AFTER_G28, planner.leveling_active));
   #endif
 
+  // Cancel any prior G29 session
+  TERN_(PROBE_MANUALLY, g29_in_progress = false);
+
+  // Disable leveling before homing
+  TERN_(HAS_LEVELING, set_bed_leveling_enabled(false));
+
   // Reset to the XY plane
   TERN_(CNC_WORKSPACE_PLANES, workspace_plane = PLANE_XY);
 
 
     const float z_homing_height = parser.seenval('R') ? parser.value_linear_units() : Z_HOMING_HEIGHT;
 
-    if (z_homing_height && (0 LINEAR_AXIS_GANG(|| doX, || doY, || TERN0(Z_SAFE_HOMING, doZ), || doI, || doJ, || doK))) {
+    if (z_homing_height && (LINEAR_AXIS_GANG(doX, || doY, || TERN0(Z_SAFE_HOMING, doZ), || doI, || doJ, || doK))) {
       // Raise Z before homing any other axes and z is not already high enough (never lower z)
       if (DEBUGGING(LEVELING)) DEBUG_ECHOLNPAIR("Raise Z (before homing) by ", z_homing_height);
       do_z_clearance(z_homing_height);
       TERN_(BLTOUCH, bltouch.init());
     }
 
+    // Diagonal move first if both are homing
     TERN_(QUICK_HOME, if (doX && doY) quick_home_xy());
 
     // Home Y (before X)
   // Clear endstop state for polled stallGuard endstops
   TERN_(SPI_ENDSTOPS, endstops.clear_endstop_state());
 
-  #if BOTH(DELTA, DELTA_HOME_TO_SAFE_ZONE)
-    // move to a height where we can use the full xy-area
-    do_blocking_move_to_z(delta_clip_start_height);
-  #endif
+  // Move to a height where we can use the full xy-area
+  TERN_(DELTA_HOME_TO_SAFE_ZONE, do_blocking_move_to_z(delta_clip_start_height));
 
-  TERN_(HAS_LEVELING, set_bed_leveling_enabled(leveling_restore_state));
+  TERN_(CAN_SET_LEVELING_AFTER_G28, if (leveling_restore_state) set_bed_leveling_enabled());
 
   restore_feedrate_and_scaling();
 

Marlin/src/gcode/gcode.h

   static void process_subcommands_now(char * gcode);
 
   static inline void home_all_axes(const bool keep_leveling=false) {
-    process_subcommands_now_P(keep_leveling ? G28_STR : TERN(G28_L0_ENSURES_LEVELING_OFF, PSTR("G28L0"), G28_STR));
+    process_subcommands_now_P(keep_leveling ? G28_STR : TERN(CAN_SET_LEVELING_AFTER_G28, PSTR("G28L0"), G28_STR));
   }
 
   #if EITHER(HAS_AUTO_REPORTING, HOST_KEEPALIVE_FEATURE)

Marlin/src/inc/Conditionals_LCD.h

   #endif
 #endif
 
+#if DISABLED(DELTA)
+  #undef DELTA_HOME_TO_SAFE_ZONE
+#endif
+
 // This flag indicates some kind of jerk storage is needed
 #if EITHER(CLASSIC_JERK, IS_KINEMATIC)
   #define HAS_CLASSIC_JERK 1

Marlin/src/lcd/menu/menu_probe_offset.cpp

 // Global storage
 float z_offset_backup, calculated_z_offset, z_offset_ref;
 
-#if ENABLED(HAS_LEVELING)
+#if HAS_LEVELING
   bool leveling_was_active;
 #endif
 

Marlin/src/lcd/menu/menu_tramming.cpp

 
   // Inject G28, wait for homing to complete,
   set_all_unhomed();
-  queue.inject_P(TERN(G28_L0_ENSURES_LEVELING_OFF, PSTR("G28L0"), G28_STR));
+  queue.inject_P(TERN(CAN_SET_LEVELING_AFTER_G28, PSTR("G28L0"), G28_STR));
 
   ui.goto_screen([]{
     _lcd_draw_homing();