Acrobat Pro DC - Tool Bar Size (Font)

My Acrobat Pro XI automatically changed to Pro DC,  possibly through a company update.   The tool bars are now very large.   Previously in Pro XI,  I was able to reduce the size through "Edit - Preferences -  Scale for Screen Resolution" by setting it to 100%.   This feature does not appear to be available in the Pro DC as I am only able to set it to "Auto-Detect".   Is there any other way to change this scale in Pro DC?    I find the larger size distracting and a waste of screen space.  Any help would be greatly appreciated.

Thanks!   DM