Acrobat DC Pro Print Production/Output preview window issue.

Acrobat Pro DC, Windows 10, current version.  A few months ago there was an update that made my Print Production/Output Preview look like this (See attached: )

There is a tremendous amount of extra empy window to the right, and I cannot resize it side-to-side.  I have to move it around a lot when checking out customer pdfs, just to scroll up and down the window as needed - I work for a print company - yes, we still exist - and we use a lot of pdfs, and I resent this unnecessary use of my monitor space, and time.  Please get it fixed.