Luma Key Gain Adjust

Adjust the Gain setting for the Luma upstream keyer.

Message	Description	Arguments
/mixeffect/usk/luma/key/gain/adjust	Adjust the Gain setting for the Luma upstream keyer.	Multiple

Argument	Type	Description
Adjustment Value	Float	-X to decrease the value by a certain amount, Y to increase the value by a certain amount
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.