Shaded with edge display mode support.

Functionality to show edges of faces on shaded shapes is available since 6.5.4, developed in context of #23407 (see release notes of 6.5.4). I suppose it covers what is proposed in this issue, even if implemented differently, and propose that this issue can be closed.

Dear Vico,

could you please comment if existing functionality is sufficient for you?

pload VISUALIZATION MODELING
box b 10 10 10
vinit View1
vclear
vdisplay b
vsetdispmode b 1
vshowfaceboundary b 1 255 0 0
vfit

Dear KGV,

I'm currently using "show face boundary" function to implement "shared with edge" feature. Yes, it works properly and it's sufficient for me too. It would be more user friendly if there is such a display mode provided directly. I think there are other users like me don't know how to implement this feature at the first glance.

[signature removed]
Vico

I am closing the issue as "no change required". Adding new display modes could possibly conflict with existing applications implementing their own specific display modes. In general, this kind of tuning is to be done on application level.