Hi
Help needed to figure out how to show window openings on the 2d window, something like this :-

After reading OKH's very thorough explanation i am none the wiser, does anyone know of an idiots guide or video.
I have created a range of 5 double glazed windows and 10 doors, interior, exterior and patio which i would like to share but would prefer to do so with the sash openings showing.
Hopefully
Mike