I have upgraded from acrobat 9 pro to 2017 pro. I am trying to use the thumbnail view in the same way I did in ver 9. I am unable to reduce the thumbnail to a reasonably small size. It seems there is a current minimum size for a thumbnail in this new 2017 version. I would like to view approximately 50 thumbnails in the pane, which I was able to do in ver 9. In order to come close to that amount of thumbnails, I would need to fill the screen with the thumbnail pane and then what would be the point.
I have a 4K display and have set my display to max resolution, if that is a factor.