Posted by dellus on May 21, 2017; 10:18am
URL: https://forum.librecad.org/How-to-print-construction-layer-tp5714869p5714872.html

It is the purpose of a construction layer to provide auxiliary lines helpful to make the drawing but which are not thought to be a visible part of the drawing. So probably LibreCad has been designed not to print construction layers at all.