Posted by dellus on Feb 25, 2016; 12:28pm
URL: https://forum.librecad.org/Adjusting-the-printer-to-print-dark-lines-in-LibreCad-drawings-tp5712550p5713074.html

Are you shure the line width doesn't change? Zoom in very close. In drawing view line width is shown in real life size in relation to the length of the line, so in a long line it will always appear thin. Only in print preview it will look like on paper, printed with the true set line width (in mm),  relative appearence depending on scale.