diff --git a/Marlin/src/gcode/gcode.h b/Marlin/src/gcode/gcode.h
index c6b4a40d9f69..589cd2bc486c 100644
--- a/Marlin/src/gcode/gcode.h
+++ b/Marlin/src/gcode/gcode.h
@@ -128,6 +128,8 @@
  * M84  - Disable steppers until next move, or use S<seconds> to specify an idle
  *        duration after which steppers should turn off. S0 disables the timeout.
  * M85  - Set inactivity shutdown timer with parameter S<seconds>. To disable set zero (default)
+ * M86  - Set / Report Hotend Idle Timeout. (Requires HOTEND_IDLE_TIMEOUT)
+ * M87  - Cancel Hotend Idle Timeout (by setting the timeout period to 0). (Requires HOTEND_IDLE_TIMEOUT)
  * M92  - Set planner.settings.axis_steps_per_mm for one or more axes. (Requires EDITABLE_STEPS_PER_UNIT)
  *
  * M100 - Watch Free Memory (for debugging) (Requires M100_FREE_MEMORY_WATCHER)
@@ -213,6 +215,8 @@
  * M281 - Set servo min|max position: "M281 P<index> L<min> U<max>". (Requires EDITABLE_SERVO_ANGLES)
  * M282 - Detach servo: "M282 P<index>". (Requires SERVO_DETACH_GCODE)
  * M290 - Babystepping (Requires BABYSTEPPING)
+ * M293 - Babystep Z UP (Requires EP_BABYSTEPPING)
+ * M294 - Babystep Z DOWN (Requires EP_BABYSTEPPING)
  * M300 - Play beep sound S<frequency Hz> P<duration ms>
  * M301 - Set PID parameters P I and D. (Requires PIDTEMP)
  * M302 - Allow cold extrudes, or set the minimum extrude S<temperature>. (Requires PREVENT_COLD_EXTRUSION)
@@ -246,6 +250,7 @@
  * M430 - Read the system current, voltage, and power (Requires POWER_MONITOR_CURRENT, POWER_MONITOR_VOLTAGE, or POWER_MONITOR_FIXED_VOLTAGE)
  * M485 - Send RS485 packets (Requires RS485_SERIAL_PORT)
  * M486 - Identify and cancel objects. (Requires CANCEL_OBJECTS)
+ * M493 - Get or set input FT Motion / Shaping parameters. (Requires FT_MOTION)
  * M500 - Store parameters in EEPROM. (Requires EEPROM_SETTINGS)
  * M501 - Restore parameters from EEPROM. (Requires EEPROM_SETTINGS)
  * M502 - Revert to the default "factory settings". ** Does not write them to EEPROM! **
@@ -261,7 +266,7 @@
  * M554 - Get or set IP gateway. (Requires enabled Ethernet port)
  * M569 - Enable stealthChop on an axis. (Requires at least one _DRIVER_TYPE to be TMC2130/2160/2208/2209/5130/5160)
  * M575 - Change the serial baud rate. (Requires BAUD_RATE_GCODE)
- * M592 - Get or set nonlinear extrusion parameters. (Requires NONLINEAR_EXTRUSION)
+ * M592 - Get or set Nonlinear Extrusion parameters. (Requires NONLINEAR_EXTRUSION)
  * M593 - Get or set input shaping parameters. (Requires INPUT_SHAPING_[XY])
  * M600 - Pause for filament change: "M600 X<pos> Y<pos> Z<raise> E<first_retract> L<later_retract>". (Requires ADVANCED_PAUSE_FEATURE)
  * M603 - Configure filament change: "M603 T<tool> U<unload_length> L<load_length>". (Requires ADVANCED_PAUSE_FEATURE)
@@ -274,15 +279,17 @@
  * M701 - Load filament (Requires FILAMENT_LOAD_UNLOAD_GCODES)
  * M702 - Unload filament (Requires FILAMENT_LOAD_UNLOAD_GCODES)
  *
- * M704 - Preload to MMU (Requires PRUSA_MMU3)
- * M705 - Eject filament (Requires PRUSA_MMU3)
- * M706 - Cut filament (Requires PRUSA_MMU3)
- * M707 - Read from MMU register (Requires PRUSA_MMU3)
- * M708 - Write to MMU register (Requires PRUSA_MMU3)
- * M709 - MMU power & reset (Requires PRUSA_MMU3)
+ *** PRUSA_MMU3 ***
+ * M704 - Preload to MMU
+ * M705 - Eject filament
+ * M706 - Cut filament
+ * M707 - Read from MMU register
+ * M708 - Write to MMU register
+ * M709 - MMU power & reset
  *
  * M808 - Set or Goto a Repeat Marker (Requires GCODE_REPEAT_MARKERS)
  * M810-M819 - Define/execute a G-code macro (Requires GCODE_MACROS)
+ * M820 - Report all defined M810-M819 G-code macros (Requires GCODE_MACROS)
  * M851 - Set Z probe's XYZ offsets in current units. (Negative values: X=left, Y=front, Z=below)
  * M852 - Set skew factors: "M852 [I<xy>] [J<xz>] [K<yz>]". (Requires SKEW_CORRECTION_GCODE, plus SKEW_CORRECTION_FOR_Z for IJ)
  *