I'm trying to print a specify window on a A4 page (landscape, 297 x 210 mm).

This is simply impossible without big border. Even if the part of the drawing you want to print has a size of 270 x 190 mm, you get borders of approx. 100 mm not as expected only 10mm.

I work with DraftSight 10.9.522 on a Mac OS X 10.6.5.