Posted by dellus on Jul 09, 2022; 11:30am
URL: https://forum.librecad.org/Colors-of-library-objects-tp5721714p5721862.html

For objects from the library to take the properties of the layer they are imported to, they have to be drawn/ created originally on layer 0. Otherwise they will keep their original properties.

Indeed there is no "grouping" function as an opposite to "explode". But you can make a new block within the drawing out of the exploded and maybe modified object.