Adobe Photoshop CC 2014 v.14.xx - Manual (Page 348)

selections:adding to channelAdd to Channel
selections:subtracting from channelSubtract From Channel
Intersect With Channel optionselections:intersecting in channelIntersect With Channel
Note:
Document
Channel
Invert
New Selection
Add To Selection
Adds the selection to the current channel contents.
Deletes the selection from the channel contents.
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
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:
Chooses the source to load.
Chooses the channel containing the selection you want to load.
Selects the non-selected areas.
3. Select an Operation option to specify how to combine the selections if the image already has a selection:
Adds the loaded selection.
Adds the loaded selection to any existing selections in the image.
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