Masks in image editing software are a way of protecting specific areas of your image, just as you would use masking tape when painting your house. A mask consists of a grayscale channel, called an alpha channel and is often displayed as a ruby overlay so the underlying image can be seen through the mask. The darkest areas of a mask are the areas most protected and the white areas are unprotected. Shades of gray represent areas of partial protection that corresponds with the level of gray.

history | show excerpt | excerpt history