Adobe Photoshop CS4 - Manual (Page 286)

279 USING PHOTOSHOP CS4
Selecting and masking
Last updated 1/10/2010
Subtract From Channel Deletes the selection from the channel contents.
Intersect With Channel Keeps the areas of the new selection that intersect with the channel contents.
You can select the channel from the Channels panel to see the saved selection displayed in grayscale.
Load a saved selection from the Channels panel
You can reuse a previously saved selection by loading it into an image. You can also load the selection into an image
after you finish modifying an alpha channel.
❖ Do one of the following in the Channels panel:
• Select the alpha channel, click the Load Selection button at the bottom of the panel, and then click the composite
color channel near the top of the panel.
• Drag the channel containing the selection you want to load onto the Load Selection button.
• 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.
You can drag a selection from one open Photoshop image into another.
Load a saved selection
Note: If you are loading a saved selection from another image, make sure to open it. Also, make sure your destination
image is active.
1 Choose Select > Load Selection.
2 Specify the Source options in the Load Selection dialog box:
Document Chooses the source to load.
Channel Chooses the channel containing the selection you want to load.
Invert Selects the non-selected areas.
3 Select an Operation option to specify how to combine the selections if the image already has a selection:
New Selection Adds the loaded selection.
Add To Selection Adds the loaded selection to any existing selections in the image.
Subtract From Selection Subtracts the loaded selection from existing selections in the image.
Intersect With Selection Saves a selection from an area intersected by the loaded selection and existing selections in
the image.
You can drag a selection from one open Photoshop image into another.