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Channels

The Footage, Composition, and Layer windows allow you to view the individual red, green, blue, and alpha channels of an image. Color channels appear as grayscale images in which the degree of white corresponds to the color value. You can also view the color channel using its own color. The alpha channel appears as a grayscale image as well, where the degree of white corresponds to opacity. As you may recall from Chapter 2, you can even view the unmultiplied color channels—that is, the color channels without the alpha taken into account. For more about alpha channels, see the Chapter 2 sidebar “Alpha Bits: Understanding Straight and Premultiplied Alpha.”


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