Convert lines/circles to roof

[Equinoctial]

Hello, I started with Archicad two days ago and I want to connect two curved lines (drawn with the spline tool) and then convert them into a roof.
Is it possible to convert circles/lines and other to walls/ceilings or similar?

[runxel]

Keyword: Magic Wand.

But I'd recommend a proper training course. Otherwise you might have not so much joy.

[Equinoctial]

Yes, I noticed that. Because I looked up the word (Magic Wand) before I started the thread, but then didn't understand how to do it.

[Equinoctial · Accepted solution]

But after looking once more I manage to convert a curved line to ceiling with "Space"