Masks crop part of an image so that only a portion of the image appears through the shape of the mask. You can make a mask from a single path or a compound path. You can also import masks made in Photoshop files.
In this section, you'll create a compound path from the checkerboard pattern on the Checkerboard layer and create an opacity mask from the compound path, so that the Background layer appears through the mask. Then you'll adjust the colors in Blue Chess.psd to contrast with the Background layer. You'll also use an opacity mask that was created in Photoshop and saved as a layer mask.
Select the magic wand tool () in the toolbox.
Using the magic wand tool, click the upper left ...