You can paint on layers, and preserve layer transparency to prevent painting on transparent areas. You can also move layer content to change the overall image layout. Using selections, you can turn an area of a layer into a floating object so that you can move it separately. Reference layers, low-resolution representations of an image, let you quickly manipulate images in ways that might otherwise require more time.
You can edit a layer's content by applying effects to it, such as drop shadows and patterns, and by transforming its dimensions. You can also change a layer's opacity, and use composite methods to change how a layer blends with other layers. The Image Portfolio lets you save the contents of a layer for future use.
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