Posted by linuxguy123 on Feb 09, 2019; 7:28pm
URL: https://forum.librecad.org/Can-t-draw-a-line-with-negative-coordinates-on-Linux-tp5716915p5716921.html

This issue is discussed here:
https://github.com/LibreCAD/LibreCAD/issues/981

The solution is to use 0-1 as the formula for -1, for example.