Posted by dellus on Dec 04, 2016; 12:39pm
URL: https://forum.librecad.org/Difficulty-changing-line-width-tp5714453p5714466.html

I have no explanation why it doesn't work for you. Maybe a case for ravas. Maybe also things are different in Linux and Mac than in Windows (having to add .pdf manually looks like that).
Upgrading to the newest stable version always is a good idea.