Posted by LordOfBikes on Nov 15, 2019; 8:09am
URL: https://forum.librecad.org/Tools-Not-working-tp5717969p5717972.html

Concerning parallel, where do you enter the distance? In the command line?
When you activate the Parallel tool, there is an input box in the tool option bar, above the drawing area.
This is the place to enter the distance for the parallel line.
No need to select any entity then, by moving the mouse you should get a preview when the mouse pointer is near to any object.
When the preview is OK, left click to place the parallel entity.

Concerning trimming, there is a recent thread, maybe you have a similar issue?
https://forum.librecad.org/trim-command-tp5717948.html