Milt

I assume that you're talking about slicing up bitmaps, but in case you mean slicing up the vector drawing first - don't!

A number of people have reported trouble with this, however I find it seamless (literally). My technique is as follows:

1. Convert the drawing to a single bitmap using your chosen dithering and palette,

2. Set the quality to 'Normal',

3. Slice up the drawing using horizontal and vertical lines and Arrange > Combine Shapes > Slice (cut) Shapes,

4. Export each piece with the same dpi and palette as the original.

Explanation:
1. The first conversion defines how the assembled bitmap will look.

2. Setting the quality to normal prevents Xara from anti-aliasing the edges.

3. Because of the way Xara's bitmap sampling algorithm works, horizontal and vertical lines guarantee that what is lost from one piece will appear in the next. The pieces may have fractional screen dimensions, but this in itself will not result in any losses.

4. The sampling algorithm works most reliably when it doesn't have to do any resizing, so keep the same dpi throughout. You've already done the dithering, so just keeping the same palette will ensure that each new bitmap copy is identical to the original.

Regards - Sean