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Combining Channel Masks

Channel masks are simply selections, which are defined with black, white, and shades of gray. Once a channel mask is placed in the Channels palette, you can use Photoshop's vast array of drawing and painting tools or filters. The Gaussian Blur filter can make a great enhancement to a channel mask. It's even possible to combine the selection elements of two or more channels together, and in doing so, create an even more complicated mask.

Combine Channel Masks

Open a document that contains two or more channels masks.

Click the channels palette.

Press Ctrl+click (Win) or +click (Mac) on one of the channel masks.

The white areas of the channel become a selection.

Press Shift+Ctrl+click (Win) or Shift+ +click (Mac) a second channel mask.

The white areas of the second channel mask are added to the previous selection.

Click the Save Selection As Channel button.

Photoshop takes the combined areas of the two channels and creates a new channel mask.


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