Dithering to approximate lost colors

Dithering approximates colors not in the current palette by alternating similarly colored pixels. From a distance, the colors blend to create the appearance of the missing color. Dithering is especially helpful when exporting images with complex blends or gradients or when exporting photographic images to an 8-bit graphic file format such as GIF.

Dithering can greatly increase file size.

NOTE

The dithering option is available only for GIFs, other 8-bit graphic file formats, and WBMPs.

To dither a graphic:

Enter a percentage value in the Dither text box of the Optimize panel.