Have a look at main menu:
Edit -> Current Drawing Preferences -> Dimensions
Play "with dimension line gap" and "general Factor", particularly for the two issues mentioned.
Gixxer wrote
Only found a couple of problems so far, On dimensions, I'd like to be able to adjust how far away the text is from the dimension line, but can't see an option for that. Also, I can reduce the full size drawing to O gauge size by changing the measurement units from inches to millimetres, them scaling the drawing down by approximately half, but all the lines and text comes out too thick, so I'll have to have a think again on that. Otherwise, great bit of kit. I'm looking forqward to spending the next year or so drawing out the loco in model size, then another 3 or 4 years building it, lol
Cheers
Ricky