Select the roof in floor plan, right click, Show selection/marquee in 3d.
Use axonometry. Got to Parallel Projection Settings, choose isometric axonometry
In the 3d window use Look to perpendicular of Clicked Surface
Right click anywhere outside the roof surface, Capture Window for 3d Document.
You can now set up this 3d document view as you would any section or elevation and add dimension, text, etc etc
Good luck!
Erwin Edel, Project Lead, Leloup Architecten
www.leloup.nlArchiCAD 9-26NED FULL
Windows 10 Pro
Adobe Design Premium CS5