Adobe Illustrator CS3 - Manual (Page 400)

ILLUSTRATOR CS3
User Guide
394
2 Delete the color by doing one of the following:
• Click the Delete icon .
• Choose Delete Color from the Color Table palette menu.
Save a color table
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.
1 Select Save Color Table from the Color Table palette menu.
2 Name the color table and choose a location 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 Presets/Optimized Colors folder inside the Photoshop program folder.
3 Click Save.
Important: When you reload the table, all shifted colors will appear as full swatches and will be unlocked.
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, an Adobe
Color Swatch (.aco) file, or a GIF file (to load the file’s embedded color table).
3 Click Open.
PNG-24 optimization options
PNG-24 is suitable for compressing continuous-tone images; however, it produces much larger files than JPEG
format. The advantage of using PNG-24 is that it can preserve up to 256 levels of transparency in an image.
Transparency and Matte Determine how transparent pixels in the image are optimized. See “Optimize transparency
in GIF and PNG images” on page 390.
Interlace Displays a low-resolution version of the image in a browser while the full image file is downloading. Inter-
lacing can make downloading time seem shorter and can assure viewers that downloading is in progress. However,
interlacing also increases file size.
See also
“Optimize an image for the web” on page 383
WBMP optimization options
WBMP format is the standard format for optimizing images for mobile devices, such as cell phones. WBMP supports
1-bit color, which means that WBMP images contain only black and white pixels.
The Dithering Method and Dither options determine the method and amount of application dithering. For optimal
compression, use the lowest percentage of dither that provides the detail you require.
You can select one of the following dithering methods:
No Dither Applies no dithering at all, rendering the image in purely black and purely white pixels.