Is shouldn't happen. I've just sized up to 12,000mm with no change of units.
If you can define Units, perhaps set 1mil == 1mm and use that?
I also have my MS Windows number accuracy set to 3 decimal figures: Settings > Region > Formats > Additional settings > Numbers.
Xara's input boxes are quite small but it avoids rounding in a lot of cases.
Acorn
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