Adobe 13101332 - Photoshop - Mac User Manual page 436

Adobe Photoshop Help
Using Help | Contents
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
•
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
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
on page 434.)
2 Do one of the following:
Click the Map Transparency button
•
Choose Map Selected Colors to Transparent from the Color Table palette menu.
•
The transparency grid
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
•
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
2 Lock the color:
Click the Lock button
•
Choose Lock/Unlock Selected Colors from the Color Table palette menu.
•
Using Help | Contents
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in the Color Table palette.
appears in half of each mapped color. The small square at the
.
| Index
Preparing Graphics for the Web
Back
on the Optimize palette tab or choose
"Selecting colors"
"Selecting colors" on page
Back
436
in the
or choose
434.)
436