flexi-bot/docs/marlin/_gcode/M666.md

tag	title	brief	author	group	requires	codes	parameters	examples
m0666a	Set Delta endstop adjustments	Set Delta endstop adjustments	ManuelMcLure	calibration	DELTA	M666	tag optional description values X true Adjustment for the X actuator endstop tag type adj float tag optional description values Y true Adjustment for the Y actuator endstop tag type adj float tag optional description values Z true Adjustment for the Z actuator endstop tag type adj float

Use the M666 command to adjust the endstop offsets on a Delta printer.