Posted by dellus on Oct 25, 2019; 10:25am
URL: https://forum.librecad.org/Deleting-red-datum-cross-tp5717871p5717872.html

These red absolute zero and relative zero symbols are not a part of the drawing file, just indicated by the cad system, and will not appear on a print-out and do not affect any laser cutting.

Tools - Modify - Fillet. Watch and set the Tool Options bar for the radius and whether to trim or not.