If you've ever taped off an area while you're painting to protect that area from drips and spatters, you've created a mask. In Photoshop, you apply a mask to designate part of an image for changes and to shield (mask) the unselected areas against those changes. In this way, you can apply different effects and filters in varying portions of the image or layer. In this chapter, you'll learn how to:
Set options for a quick mask
Work in Quick Mask mode
Create and use a layer mask
Explore mask examples