flexi-bot/docs/marlin/_gcode/M420.md

tag	title	brief	author	contrib	requires	group	related	codes	notes	parameters	examples
m0420	Bed Leveling State	Get and/or set bed leveling state and parameters	thinkyhead	sustmi, shitcreek	AUTO_BED_LEVELING_(3POINT|LINEAR|BILINEAR|UBL)|MESH_BED_LEVELING	motion	G29 M421	M420	- [`G28`](/docs/gcode/G028.html) disables bed leveling. Follow with `M420 S` to turn leveling on, or use `RESTORE_LEVELING_AFTER_G28` to automatically keep leveling on after [`G28`](/docs/gcode/G028.html). - The "current position" may change in response to `M420 Sn`.	tag optional description values L true Load mesh from EEPROM index (Requires `AUTO_BED_LEVELING_UBL` and `EEPROM_SETTINGS`) type int tag optional description values S true Set enabled or disabled. A valid mesh is required to enable bed leveling. If the mesh is invalid / incomplete leveling will not be enabled. type bool tag optional description values V true Verbose: Print the stored mesh / matrix data type bool tag optional description values T true Format to print the mesh data tag description 0 Human readable tag description 1 CSV tag description 4 Compact tag optional description values Z true Set Z fade height (Requires `ENABLE_LEVELING_FADE_HEIGHT`) - With Fade enabled, bed leveling correction is gradually reduced as the nozzle gets closer to the Fade height. Above the Fade height no bed leveling compensation is applied at all, so movement is machine true. - Set to 0 to disable fade, and leveling compensation will be fully applied to all layers of the print. type tag float linear tag optional description values C true Center the mesh on the mean of the lowest and highest points type bool

Get and/or set bed leveling state. For mesh-based leveling systems use Z parameter to set the Z Fade Height.

With AUTO_BED_LEVELING_UBL you can use L to load a mesh from EEPROM.