Steve
The help file on this issue gives the following:
<BLOCKQUOTE class="ip-ubbcode-quote"><font size="-1">quote:</font><HR> You can select between three types of dithering with these options. Choosing None means there will be no dithering, Ordered using an ordered (regular) dithering pattern and Error diffusion uses error-diffused dithering (a more complex dithering technique). In general, error diffusion will give the best results, but only use dithering when really necessary as it prevents the file compression working so well and so makes files larger. You cannot use Ordered dithering with an optimized palette.
Note that you can set the dithering type for the screen display too, see Changing the screen dithering.
©1995-2001 Xara Ltd. <HR></BLOCKQUOTE>
The best way is just to experiment with these options and view the output on as many computers as you can.
Take a look here
Or even better here
I don't know how much validity this now has as 8 bit colour is fast becoming a thing of the past. I notice that on one of my sites only 5% of visitors now use 8 bit monitors.
Egg
[This message was edited by Egg Bramhill on March 20, 2004 at 22:01.]
Egg
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