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Chapter 16.  Correcting Image Color  > Adding an Alpha Channel

Adding an Alpha Channel

As noted in the last chapter, an alpha channel is an extra channel you use to store a selection in an image. Then, you can easily reload the selection from the channel, or even convert the channel to a spot color treatment as described in the section called “Adding Spot Color” in the next chapter. The steps that follow explain the easiest way to save a spot channel—by saving a selection as a spot channel.




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