# Set Chroma Keyer

### **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.
* **Fill Source**: The fill source to use for the Chroma keyer.
* **Enable Mask**: Toggle whether to crop the Chroma key area.
* **Mask Top**: The mask top value from -9.0 to 9.0.
* **Mask Bottom**: The mask bottom value from -9.0 to 9.0.
* **Mask Left**: The mask left value from -16.0 to 16.0.
* **Mask Right**: The mask right value from -16.0 to 16.0.
* **Foreground**: Adjustment on how opaque the foreground mask is.
* **Hue**: Adjustment to the hue value.
* **Gain**: Adjustment to the gain of the keyer area.
* **Y Suppress**: Adjustment to remove colored tint from the edges of the foreground elements.
* **Life**: Adjustment to lift value of the keyer area.
* **Narrow Chroma Key Range**: Boolean.
* **Enable Flying Key**: Enable the flying key.
* **Position X**: The X position of the keyer box.
* **Position Y**: The Y position the keyer box.
* **Size X**: Set the horizontal size of the keyer box.
* **Size Y**: The vertical size of the keyer box.
* **Rotation**: The rotation of the keyer box. Not all switchers support rotation.

### **Returns**

Nothing