Posted by Jaycad on Jun 07, 2022; 5:31am
URL: https://forum.librecad.org/How-to-draw-straight-lines-without-using-grid-tp5721763p5721766.html

Try starting the line with Restrict Vertical/Horizontal  turned off, then turn it on to finish the line.  That's how I've been using it, anyway.

Another solution is to not use Restrict Vertical/Horizontal but hold down the shift key after starting a line. This constrains the line to 15° angle intervals so if you hold the cursor close to horizontal or vertical, you can place the endpoint vertically or horizontally from the start point.