> 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/osc/messages/upstream-keyers/luma-key.md).

# Luma Key

| Message                   | Description                                                   | Arguments |
| ------------------------- | ------------------------------------------------------------- | --------- |
| `/mixeffect/usk/luma/key` | Sets the all of the key settings for the Luma upstream keyer. | Multiple  |

| Argument       | Type    | Description                                          |
| -------------- | ------- | ---------------------------------------------------- |
| Pre Multiplied | Integer | <p>0 = Off<br>1 = On<br>2 = Toggle</p>               |
| Clip           | Float   | Value from 0-100.0.                                  |
| Gain           | Float   | Value from 0-100.0                                   |
| Invert Key     | Integer | <p>0 = Off<br>1 = On<br>2 = Toggle</p>               |
| USK            | Integer | One-based index of the Upstream Keyer. Default is 1. |
| M/E            | Integer | One-based index of the Mix Effect Bus. Default is 1. |