Excellent forum, with more tips than Acrobat DC offers.
Wow. Some of the previous comments I have read do not make end-user friendly sense. As an architect, my clients always complain that my drawings open rotated and not to 'fit page'. Especially those who view on tablets or phones (getting more frequent now). With your tips they all now open correctly. After all my years of trying to fix this you have answered my prayers. Thank you. H