In the color grading filter, the “Lift” setting starts out at 0%, which is the minimum value and I assume is “unity” (no change). This makes it impossible to lower the black levels of existing video as it is already at the minimum setting and it is not possible to enter negative values.
The gamma control defaults to 50% and has a range of +/- 50, i.e. it ranges from 0% to 100%.
Would it be possible to make the Lift and Gain controls behave like the Gamma control and have a range of +/- 50% from “unity” so that these controls can be adjusted up or down from default? Better still, have all three controls default to 0% (unity) and give them a range from -50% to +50%?