diff --git a/Marlin/Marlin_main.cpp b/Marlin/Marlin_main.cpp
index b3e0ff4499..5913c8f2e6 100644
--- a/Marlin/Marlin_main.cpp
+++ b/Marlin/Marlin_main.cpp
@@ -89,7 +89,7 @@
  * M24  - Start/resume SD print. (Requires SDSUPPORT)
  * M25  - Pause SD print. (Requires SDSUPPORT)
  * M26  - Set SD position in bytes: "M26 S12345". (Requires SDSUPPORT)
- * M27  - Report SD print status. (Requires SDSUPPORT) Or, with 'S<seconds>' sets the SD status auto-report interval. (Requires AUTO_REPORT_SD_STATUS)
+ * M27  - Report SD print status. (Requires SDSUPPORT) Or, with 'S<seconds>' set the SD status auto-report interval. (Requires AUTO_REPORT_SD_STATUS)
  * M28  - Start SD write: "M28 /path/file.gco". (Requires SDSUPPORT)
  * M29  - Stop SD write. (Requires SDSUPPORT)
  * M30  - Delete file from SD: "M30 /path/file.gco"
@@ -134,7 +134,7 @@
  * M119 - Report endstops status.
  * M120 - Enable endstops detection.
  * M121 - Disable endstops detection.
- * M122 - Debug stepper (Requires HAVE_TMC2130)
+ * M122 - Debug stepper (Requires HAVE_TMC2130 or HAVE_TMC2208)
  * M125 - Save current position and move to filament change position. (Requires PARK_HEAD_ON_PAUSE)
  * M126 - Solenoid Air Valve Open. (Requires BARICUDA)
  * M127 - Solenoid Air Valve Closed. (Requires BARICUDA)
@@ -203,9 +203,9 @@
  * M540 - Enable/disable SD card abort on endstop hit: "M540 S<state>". (Requires ABORT_ON_ENDSTOP_HIT_FEATURE_ENABLED)
  * 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)
+ * M605 - Set Dual X-Carriage movement mode: "M605 S<mode> [X<x_offset>] [R<temp_offset>]". (Requires DUAL_X_CARRIAGE)
  * M665 - Set delta configurations: "M665 L<diagonal rod> R<delta radius> S<segments/s> A<rod A trim mm> B<rod B trim mm> C<rod C trim mm> I<tower A trim angle> J<tower B trim angle> K<tower C trim angle>" (Requires DELTA)
- * M666 - Set delta endstop adjustment. (Requires DELTA)
- * M605 - Set dual x-carriage movement mode: "M605 S<mode> [X<x_offset>] [R<temp_offset>]". (Requires DUAL_X_CARRIAGE)
+ * M666 - Set/get offsets for delta (Requires DELTA) or dual endstops (Requires [XYZ]_DUAL_ENDSTOPS).
  * M701 - Load filament (requires FILAMENT_LOAD_UNLOAD_GCODES)
  * M702 - Unload filament (requires FILAMENT_LOAD_UNLOAD_GCODES)
  * M851 - Set Z probe's Z offset in current units. (Negative = below the nozzle.)