This is one of the few remaining things I have on my cabinet wish list.  What I currently do is one of a few things depending on the situation...   For cabinet openings or face frame measurement details I usually do one of the following: -Make a copy of the cabinet and either drag it off to the side or paste it into a new plan, remove all the doors (make them "openings"), remove the shelves, create a CAD Detail from View and then detail accordingly.   -Place a cross section/elevation camera