White represents full opaque; gray, semi-opaque; and black, a transparent image in a layer mask. A newly created layer mask is filled with white, so all image parts are in visible.
To create a required mask, use any of the following tools: painting, color corrections or filters.
Directions for working with layer masks:
To add a mask to a layer:
To remove a mask from a layer:
To edit a layer mask:
To show or hide a layer mask: