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436
Adobe Photoshop Help
Preparing Graphics for the Web
Using Help
|
Contents
|
Index
Back
436
To revert Web-shifted colors to their original colors:
Do one of the following:
•
Select a Web-shifted color in the color table and click the Web Shift button
in the
Color Table palette.
•
To revert all Web-shifted colors in the color table, choose Unshift All Web Shifted Colors
from the Color Table palette menu.
To specify tolerance for shifting colors automatically to the closest Web palette
equivalents:
In the Optimize panel/palette, enter a value for Web Snap or drag the pop-up slider.
A higher value shifts more colors.
(In ImageReady, click the Show Options control
on the Optimize palette tab or choose
Show Options from the Optimize palette menu to view the Web Snap option.)
Mapping colors to transparency
You can add transparency to an optimized image by mapping existing colors to trans-
parency.
To map colors to transparency:
1
Select one or more colors in the optimized image or color table. (See
“Selecting colors”
on page 434
.)
2
Do one of the following:
•
Click the Map Transparency button in the Color Table palette.
•
Choose Map Selected Colors to Transparent from the Color Table palette menu.
The transparency grid appears in half of each mapped color. The small square at the
lower right of the color swatch indicates that the color is locked.
To revert transparency to its original colors:
Do one of the following:
•
Select the colors you want to revert, click the Map Transparency button or choose
Unmap Selected Colors from Transparent from the Color Table palette menu.
•
To revert all transparency-mapped colors, choose Unmap All Transparent Colors.
Locking colors in the color table
You can lock selected colors in the color table to prevent them from being dropped when
the number of colors is reduced and to prevent them from dithering in the application.
Note:
Locking colors does not prevent them from dithering in a browser.
To lock a color:
1
Select one or more colors in the color table. (See
“Selecting colors” on page 434
.)
2
Lock the color:
•
Click the Lock button .
•
Choose Lock/Unlock Selected Colors from the Color Table palette menu.
