# \[Marlin] M420 - Bed Leveling State {% hint style="success" %} **📅Update: 2020/10/13** {% endhint %} ## Description Get and/or set bed leveling state. For mesh-based leveling systems use `Z` parameter to set the Z Fade Height. ## Notes The "current position" may change in response to `M420 Sn`. ## Usage `M420` `[S]` `[V]` `[Z]` ## Parameters * `[S]` Set enabled or disabled. A valid mesh is required to enable bed leveling. If the mesh is invalid / incomplete leveling will not be enabled. * `[V]` Verbose: Print the stored mesh / matrix data * `[Z]` 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. ## Examples Enable bed leveling: ``` M420 S1 ``` Disable bed leveling: ``` M420 S0 ``` Print the stored mesh/matrix data ``` M420 V ``` --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://manual.rotrics.com/gcode/marlin-original-commands/marlin-m420-bed-leveling-state-manual.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.