Adjust the lightness and darkness, and the overall tonal range, of images.
Settings
The following settings can be adjusted in the dialog:
Brightness—controls the lightness/darkness of the image. Drag the slider to the left to decrease brightness, drag to the right to increase it.
Contrast—controls the tonal range of the image. Drag the slider to the left to decrease the contrast between dark and light areas, drag to the right to increase it.
Linear—by default, the adjustment prevents shadow and highlight clipping by modifying pixels relative to their original lightness value. When selected, this option modifies pixels using absolute values and clipping may occur.
