Acrobat DC - How Do I Enable Thumbnails.... on Mac 10.12.6

I have search everywhere and I cannot find how on a mac with 10.12.6 OSX to enable thumbnail previews by default for every pdf document. I found the setting where if I had opened it before it will remember the defaults from last time it was open, but I need thumbnails to show automatically for every pdf. This becomes cumbersome when I have to enable thumbnails for the 200+ pdfs I create each day.

If this has been answered in the past please direct me to the correct answer as I may not have searched for the right "keywords"