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Chapter 10. Creating Masks > Understanding Masks

Understanding Masks

You use a mask in Flash to control what is viewable on a layer. Whatever you paint or draw onto a mask layer defines the viewable area on any layer it is linked to. Essentially, the shape you place on the mask layer acts like a window to the layers linked beneath it.

To link a layer, you simply drag it into the linked set. When a layer is linked to a mask it displays a tinted icon and is indented underneath the mask layer. Masks are useful for cropping artwork on the Stage and animated masks can create interesting visual effects.


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