Adobe PHOTOSHOP CS2, Руководство пользователя, Страница: 352 / 815

344 ADOBE PHOTOSHOP CS2
User Guide
To save a selection to a new or existing channel
1
In Photoshop or ImageReady, use a selection tool to select the area or areas of the image that you 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 the selection as a new channel, type a name for the channel in the Name text box. In ImageReady,
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
selection 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
Mask 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 the color and opacity settings affect only the appearance of the mask and have no effect on how underlying areas
are protected. Changing these settings may make the mask more easily visible against the colors in the image.