User's Manual

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ADOBE PHOTOSHOP CS2
User Guide
To save a selection to a new or existing channel
1 In PhotoshoporImageReady, useaselectiontooltoselectthe area or areasofthe imagethatyou want to isolate.
2 Choose Select > Save Selection.
3 Specify the following in the Save Selection dialog box, and click OK:
Document Chooses a destination image for the selection. By default, the selection is placed in a channel in your
active image. You can choose to save the selection to a channel in another open image with the same pixel dimensions
or to a new image.
Channel Chooses a destination channel for the selection. By default, the selection is saved in a new channel. You can
choose to save the selection to any existing channel in the selected image or to a layer mask if the image contains
layers.
4 If you’re saving theselection as anew channel, type anamefor thechannel in theNametextbox.InImageReady,
you can change the default channel name if you want to.
5 If you’re saving the selection to an existing channel, select how to combine the selections:
Replace Channel Replaces the current selection in the channel.
Add to Channel Adds the selection to the current channel contents.
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.
In Photoshop, you can select the channel in the Channels palette to see the saved selection displayed in grayscale. A
s
election saved in ImageReady will appear in a new or existing channel in the Photoshop Channels palette.
To change an alpha channel’s options
1 In the Channel palette, do one of the following:
• Select the channel, click the triangle in the upper right corner of the Channels palette, and choose Channel
Options from the palette menu.
• Double-click the channel thumbnail in the Channels palette.
2 If you want to rename the channel, type the new name in the Name text box of the Channel Options dialog box.
3 To set a display option for the mask, select one of the following in the Channel Options dialog box:
Masked Areas Sets masked areas to black (opaque) and selected areas to white (transparent). Painting with black
increases the masked area; painting with white increases the selected area. When this option is selected, the Quick
M
ask button in the toolbox becomes a white circle on a gray background
.
Selected Areas Sets masked areas to white (transparent) and selected areas to black (opaque). Painting with white
increases the masked area; painting with black increases the selected area. When this option is selected, the Quick
Mask button in the toolbox becomes a gray circle on a white background
.
Spot Color Converts an alpha channel to a spot color channel.
4 To specify the appearance of the mask, do the following in the Channel Options dialog box:
• To choose a new mask color, click the color box, and choose a new color.
• To change the opacity, enter a value between 0% and 100%.
Both thecolor andopacity settings affect only theappearanceofthe mask andhavenoeffectonhow underlying areas
a
re protected. Changing these settings may make the mask more easily visible against the colors in the image.