Posted by dellus on Aug 19, 2017; 10:57am
URL: https://forum.librecad.org/Select-tool-not-working-tp5715255p5715260.html

Trim: When you select the limiting entity it just changes the colour, doesn't get dashed, maybe hard to notice. Then select the entity to be trimmed.
Parallel: You don't get a preview when just approaching a line, it has to be selected, either before triggering the "offset" command (then there will be a preview at once, without having to approach the line), or during the "offset" process. Is the proper distance set (not 0)?
Else I have no explanation for your troubles. Could it be a hardware problem (mouse)?