Posted by ravas on Sep 27, 2016; 2:44am
URL: https://forum.librecad.org/Copy-Layer-List-to-Anotehr-File-tp5714279p5714280.html

You could delete all the entities in the drawing and save it under a different name.

I recommend upgrading to 2.1.3,
or if you prefer to continue as a tester:
https://sourceforge.net/projects/librecad/files/OSX/2.2/2.2.0/alpha/