Yes, select 'empty' under 'Door panel' in the door settings. This will leave just the frame and casing visible.
If you want everything off and just leave the bare opening, turn the '3d Detail level' to 'off'. This gives you the option of turning the door back on again rather than use an empty opening.
Thank you very much Peter for your quick response and solution. Been using ArchiCAD for many years and had no idea. Just tried it and it works beautifully. I'm very appreciative.
