How does one draw simple cavity walls. And once I can figure this out, is there a way to insert windows, doors and openings so that the opening is 'framed', ie. the brickwork around the window or door is actually shown..
If you are on AC24 or AC25, you can use the Opening tool to place a vertical Opening into the Wall to create the Cavities. In AC25, Openings can even have a Polygonal shape:
@Jensk , can you please clarify.
Do you mean how do you draw a cavity wall (as in multiple skins with an air space between them), or how to add a cavity (void) in a wall as Laszlo has shown you?