Graphics Programs Reference
In-Depth Information
3 Choose File > Save for Web. The Save for Web window appears.
4 Choose GIF 64 No Dither from the Preset drop-down menu, and select the Transparency check box.
Notice in the GIF preview that the image size is now about 10K.
Select a GIF preset.
Understanding dithering
Dithering is the attempt to approximate a color from a mixture of other colors when the required color is not
available. Dithering produces a pattern or grainy appearance in images, and you should only use it to help
define tonal values.
5 Keep this window open for the next part of this lesson.
Using the color table
By selecting GIF 64 No Dither, you have indicated that you want to use 64 colors in your optimized im-
age. Note that the color table in the optimization section displays a table of these indexed colors.
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