# 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.


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