The Brightness & Contrast effect adjusts the brightness and contrast of an entire layer (not individual channels). The default value of 0.0 indicates that no change is made. Using the Brightness & Contrast effect is the easiest way to make simple adjustments to the tonal range of the image. It adjusts all pixel values in the image at once—highlights, shadows, and midtones.

This effect works with 8-bpc, 16-bpc, and 32-bpc color.