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Chapter 3. Layers Primer > How Do Layers Work?

How Do Layers Work?

At first glance, layers might seem complex, but the idea behind them is rather simple. You isolate different parts of your image onto independent layers (Figure 3.1). These layers act as if they are separate documents stacked one on top of the other. By putting each image on its own layer, you can freely change your document's look and layout without committing to the changes. If you paint, apply a filter, or make an adjustment, it affects only the layer on which you're working. If you get into a snarl over a particularly troublesome layer, you can throw it away and start over. The rest of your document will remain untouched.

Figure 3.1. Layers isolate different parts of the image. (©2005 Regina Cleveland)



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