I have downloaded Trimdek roof object from www.steel.com.au. It is in the correct Archicad format but the company has provided it as a wall cladding, and not roof cladding. If I download it onto my roof plan I get it as an elevation, not a plan. This looks like a thick line. When I select it, change the view and try to save it as plan, it refuses to do so. I have forgotten the GDL procedure. Could someone please remind me how it is done?