Acrobat Pro DC toolbars too small

I'm using Acrobat Pro DC on a new Microsoft Surface Book laptop.  When I'm at the office I connect to an external monitor.  Initially when I did this and opened a .pdf, the document size was fine but toolbars along the top and right side of the screen were enormous.  Our IT guy adjusted some of the Adobe settings (also tried adjusting the Windows display settings but that didn't help) and managed to get the tool bars down to a reasonable size on the external monitor.  Now they are tiny though on my laptop screen and undoing the settings changes he made originally doesn't correct the problem.  I can barely read the toolbars now on my laptop they are so small.  (.pdf doc size is fine though).