At the bottom of the Select menu, you see a pair of commands that you use to store your selections for future use and to actually reuse them. When you save a selection, you create an alpha channel in the image. The alpha channel, like a color channel, is a grayscale representation of the image. White areas in the alpha channel represent areas that are selected when the channel is loaded as a selection. Black areas in the channel show you unselected areas. Gray represents feathering and other partially selected pixels.
I discuss channels in greater depth in the next section of this chapter. While discussing selection commands, the key points to remember are that you can use the Save Selection command to save any selection as an alpha channel, and then later use the Load Selection command to reactivate the selection without having to re-create it from scratch.
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