Selections and transformations | 589
Combining selections when saving or loading alpha channels
When you save or load alpha channels, you can combine the current selection with an existing alpha
channel by adding, subtracting, or intersecting with the selection. Adding to a selection combines it
with the existing channel. Subtracting a selection cuts it out of the existing channel. When intersecting a
selection, you include only those parts that are common to the selection and the existing channel.
In the following set of owl images, the artist created and saved selections for each area that she wanted to
work with separately — the eyes, the beak, and the outline. To show the selections clearly in these images,
the selections were saved to channels, reloaded, and displayed as red overlays. For more information, see
“To view or hide a channel” on page 569.
The following images show the step-by-step creation of a precise “face” selection that excludes the beak
and eyes. The purpose of the precise selection of the face is to control the brushstrokes and constrain
effects.
The image
The eye and beak channels (saved selections) are
loaded and added. The combined selection is saved
to the “eyebeak” channel.
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