Adobe Illustrator CS3 User Manual
Page 399
ILLUSTRATOR CS3
User Guide
393
4
To revert web-shifted 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 Colors from the Color Table palette menu.
Map colors to transparency
You can add transparency to an optimized image by mapping existing colors to transparency.
1
Select one or more colors in the optimized image or color table.
2
Do one of the following:
•
Click the Map Transparency button
in the Color Table palette.
•
Choose Map/Unmap Selected Colors To/From 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.
3
To revert transparency to original color, do one of the following:
•
Select the colors you want to revert and click the Map Transparency button
or choose Map/Unmap Selected
Colors To/From Transparent from the Color Table palette menu.
•
To revert all transparency-mapped colors, choose Unmap All Transparent Colors.
Lock or unlock a color
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.
1
Select one or more colors in the color table.
2
Lock the color by doing one of the following:
•
Click the Lock button
.
•
Choose Lock/Unlock Selected Colors from the Color Table palette menu.
A white square
appears in the lower right corner of each locked color.
3
Unlock the color by doing one of the following:
•
Click the Lock button
.
•
Choose Lock/Unlock Selected Colors from the Color Table palette menu.
The white square disappears from the color swatch.
Delete selected colors
You can delete selected colors from the color table to decrease the image file size. When you delete a color, areas of
the optimized image that previously included that color are rerendered using the closest color remaining in the
palette.
When you delete a color, the color table automatically changes to a Custom palette. This is because the Adaptive,
Perceptual, and Selective palettes automatically add the deleted color back into the palette when you reoptimize the
image—the Custom palette does not change when you reoptimize the image.
1
Select one or more colors in the color table.