Whenever you switch between a local palette and the global palette, or when editing a palette, the new palette is used to replace the original image. This is referred to as "Converting a palette."
Web Animator supports two methods of converting a palette. These are "conversion with dithering" and "conversion with no dithering."
In general,
Conversion with dithering is suitable for images with a wide range of tones, such as a photograph.
Conversion with no dithering is suitable for the likes of line drawings.
The following shows examples.
Converting a photograph to a palette with 216 colors:
"With dithering" "Without dithering"
Converting a line drawing to a palette with 27 colors:
"With dithering" "Without dithering"
You can set the conversion method with the "Preferences" dialog box [Image] tab and [Conversion Method].
Hint If you convert a palette too many times, the quality of the corresponding image will decrease. A palette should be edited only when absolutely necessary. In general, use a local palette whenever you insert an image. When you ultimately want to reduce the size of the file, switch the palette to the global palette.
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