Viewing color and alpha channelsYou can preview the red, green, blue, and alpha channels of a still image or movie in a Footage window, Layer window, or Composition window. When you view a color channel, areas with that color are displayed according to the color value of each pixel. For example, if you view the red channel, areas with high red values are displayed as white.
When you preview the alpha channel, After Effects displays transparent and opaque areas as black and white to make identification easier. Degrees of opacity appear as shades of gray. To view a color channel or alpha channel:
![]() A. Red channel B. Green channel C. Blue channel D. Alpha channel |