I'm very new, about one day, into LibreCad, trying to make a simple drawing with two hexagrams with circles at their vertices. I started experimentally by drawing a tiny circle, whose radius I don't know where to find, but it's very small on screen. When I click Print Preview, no matter what size circle I draw, it always shows filling the whole breadth of the page.
Why is this happening, and what can I do? Also, is their no way I can show page borders in the drawing screen, so I can position my drawing elements?