Norbert,
This has been a consistent issue for me for many years... I have not ever been able to overcome this hurdle. I would love to, as I feel it definitely detracts from the readability of the drawings, as well as the creditability... I constantly am talking to staff about making sure that "lines on the drawing mean something" and not being able to correct this but only "hide" it with tedious 2D work is frustrating.
Hopefully someone else has figured it out!
Bill Szustak RA
Principal, Springboard Design
ArchiCAD 25, macOS Ventura 13.4.1