The display of window/door opening lines should be controlled by Display Options (instead of/in addition to the objects' parameters). Typically, whether or not one wants the opening lines to appear is a function of the drawing type, not the individual opening.
Just to clarify even though our friends in Budapest have remarkably good English skills: you're talking about opening lines in section/elevation, right?
If so, I agree... a display option would be great.
One of the forum moderators • AC 26 USA and earlier • macOS Ventura 13.2.1, iMac Pro 10-Core, Radeon Pro Vega 64