Non-Destructive Mask Edits
While a selection is still loaded and active—you still see “marching ants” onscreen—you can use the Refine Edge option in the Control panel to contract, expand, or even feather the selection before saving it as a static mask in an alpha channel. Photoshop CS4 adds the ability to perform such modifications to a saved mask with the options available in the new Masks panel (Window > Masks). See Figure 9.22.
Figure 9.22. The Masks panel (far left) offers options for Density and Feathering, as well as the Mask Edge feature (right), which allows you to Smooth, Expand and Contract the mask nondestructively.
You can contract, expand, feather, and smooth the edge of an alpha channel or layer mask without ...
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