Before Photoshop CS, the only option for retouching a photograph was to use the Clone Stamp tool. This is a difficult tool to learn to use because it duplicates pixels exactly, which can create a nasty pattern look if you’re not careful.

Hurrah for the Healing Brush! This is a huge leap in retouching for Photoshop. It works by copying an area of the canvas and blending it with the surrounding pixels’ color and texture, which eliminates the pattern effect that the clone stamp can have.