Import an image file to use as a paint layer mask

 
 
 
  1. In the Paint Layers window, select a paint layer or a layer mask, then do any of the following:
    • Click Import Layer Mask.
    • Right-click a paint layer or paint layer mask and select Import Layer Mask.

    A file browser appears, letting you select an image file.

See also Export a layer mask as an image file.