> For the complete documentation index, see [llms.txt](https://docs.mixeffect.app/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.mixeffect.app/automate/shortcuts/actions/set-usk.md).

# Set USK

### **Parameters**

* **Index**: The 1-based USK index for the keyer.
* **Mix Effect Block Index**: The Mix Effect Block to change. Default is M/E 1.
* **Mode**: Enable, Disable, Toggle, Enable On Air, Disable On Air, Toggle On Air, or Set Key Type.
* **Keyer Type**: Available when the Set Key Type mode is set. Choose from Luma, Chroma, Pattern, or DVE.

### **Returns**

Nothing.Sets the status of an upstream keyer in the current switcher.