Brighten or darken a clip’s midtones without clipping its shadows or highlights. Gamma bends the tone curve while its ends stay fixed.
Overall and per channel
Gamma from 0.2 to 5 sets the overall curve, neutral at 1. The Red, Green, and Blue gammas adjust each channel’s midtones separately for casts that appear only in the middle of the range. For control over the end points too, use video levels.