Adobe PHOTOSHOP 6.0 Manual page 346

CHAPTER 12
336
Optimizing Images for the Web
Deleting colors from the color table
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 automati-
cally 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.
To delete selected colors:
1 Select one or more colors in the color table.
(See "Selecting colors" on page 333.)
2 Delete the color:
• Click on the Trash button ( ).
Choose Delete Color from the Color Table
•
palette menu.
Loading and saving color tables
You can save color tables from optimized images to
use with other images and to load color tables
created in other applications. Once you load a new
color table into an image, the colors in the
optimized image are changed to reflect the colors
in the new color table.
To save a color table:
Select Save Color Table from the Color Table
1
palette menu.
Name the color table and choose a location
2
where it will be saved. By default, the color table
file is given the extension .act (for Adobe Color
Table).
If you want to access the color table when selecting
Optimization options for a GIF or PNG image,
save the color table in the Optimized Colors folder,
inside the Presets folder in the Adobe Photoshop
folder.
3 Click Save.
To load a color table:
1 Select Load Color Table from the Color Table
palette menu.
2 Navigate to a file containing the color table you
want to load—either an Adobe Color Table (.act)
file, or a GIF file (to load the file's embedded color
table).
3 Click Open.
Using master palettes (ImageReady)
You can create a master palette to use with a group
of GIF or PNG-8 images that will be placed on a
CD-ROM or other multimedia storage medium.
When you include the master palette with a batch
of images, all images display using the same colors.