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CHAPTER 7
202
Using Channels and Masks
To load a saved selection using shortcuts
(Photoshop):
Do one of the following in the Channels palette:
Select the alpha channel, click the Load Selection
•
button (
click the composite color channel near the top of
the palette.
Ctrl-click (Windows) or Command-click
•
(Mac OS) the channel containing the selection you
want to load.
To add the mask to an existing selection,
•
press Ctrl+Shift (Windows) or Command+Shift
(Mac OS), and click the channel.
To subtract the mask from an existing selection,
•
press Ctrl+Alt (Windows) or Command+Option
(Mac OS), and click the channel.
To load the intersection of the saved selection
•
and an existing selection, press Ctrl+Alt+Shift
(Windows) or Command+Option+Shift
(Mac OS), and select the channel.
To load a saved selection into an image (Photoshop):
1
Choose Select > Load Selection. For Document,
the active filename is selected.
2
For Channel, choose the channel containing the
selection you want to load.
Click Invert to make the nonselected areas
3
selected and vice versa.
If the destination image already has a selection,
4
indicate how to combine the selections. (For infor-
mation on these options, see "Saving a mask
selection" on page 200.)
5
Click OK.
) at the bottom of the palette, and then
To load a saved selection into an image (ImageReady):
Choose Select > Load Selection, then choose an
option from the submenu.
To load a selection from another image (Photoshop):
Open the two images you want to use.
1
Note: The images must have identical pixel dimen-
sions. (See "Changing the pixel dimensions of an
image" on page 97.)
Make the destination image active, and choose
2
Select > Load Selection.
For Document, choose the source image.
3
For Channel, choose the channel containing the
4
selection you want to use as a mask.
Click Invert if you want to make the nonselected
5
areas selected and vice versa.
If the destination image already has a selection,
6
indicate how to combine the selections. (For infor-
mation on these options, see "Saving a mask
selection" on page 200.)
Click OK.
7
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