9. Using Layers for Collage and More
In this chapter, you’ll learn how to create layers and manipulate them to build complex images.
Only one pixel can operate a given location within an image, and if you paste another pixel over the first one, the old one is gone—unless it’s on a layer of its own. Layers enable you to manipulate parts of an image as separate objects, just as you can shapes and type. With layers, you can keep your options open.
When you put an object on a layer, you can move it around later on. If you paste it on the Background layer, on the other hand, you’re stuck, because whatever was behind it is no longer there. With layers, you can restack and move the contents of your layers as many times as you want without deleting ...