# \[Marlin] M204 - Set Starting Acceleration

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**📅Update: 2020/09/18**
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## Description

Set the preferred starting acceleration for moves of different types.

## Notes

* View the current setting with [`M503`](https://app.gitbook.com/docs/gcode/M503.html).
* If `EEPROM_SETTINGS` is enabled, these are saved with [`M500`](https://app.gitbook.com/docs/gcode/M500.html), loaded with [`M501`](https://app.gitbook.com/docs/gcode/M501.html), and reset with [`M502`](https://app.gitbook.com/docs/gcode/M502.html).
* Legacy `M204 S<accel>` is deprecated. Use separate paremeters `M204 P<accel> T<accel>` instead.

## Usage

`M204` `[P<accel>]` `[R<accel>]` `[S<accel>]` `[T<accel>]`

### Parameters

* `[P<accel>]` Printing acceleration. Used for moves that include extrusion (i.e., which employ the current tool).
* `[R<accel>]` Retract acceleration. Used for extruder retraction moves.
* `[S<accel>]` Legacy parameter for move acceleration. Set both printing and travel acceleration.
* `[T<accel>]` Travel acceleration. Used for moves that include no extrusion.


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