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Chapter 14. Effects in Action > Using Keying Filters

Using Keying Filters

In addition to using a clip's opacity property to make the entire image transparent, you can restrict transparency to particular areas—a technique called keying. Keying effects are listed among the other standard effects, and you adjust them using the methods you learned in Chapter 13 (Figure 14.22). But because keying effects (or simply keys) constitute such a useful class of techniques, they merit special attention.


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