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If you're old enough to remember your teacher using overhead transparencies in school, then you'll probably understand the concept of layers quite easily. Think of a layer as a thin, transparent piece of paper on which you can draw. You can draw on multiple layers, but the end result is that everything appears to be on one single layer. Because your images can become very complex, layers allow you to manage your document by separating elements onto different layers. In this chapter you'll learn how to:
Create layers
Edit and remove layers
Change how layers react to each other
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