Check your channel options

When working with alpha channels, by default, selected areas are white, and color indicates masked areas. The instructions here assume that you are working with the default Channel Options settings. However, the default settings can be changed at any point. If you find that your selections are inverted compared to those discussed within this chapter, you need to change your Channel Options. Simply double-click on your alpha channel thumbnail in the Channels palette to access the Channel Options. In the Channel Options, ensure that color indicates masked areas and not selected areas.

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