How to disable the world view in Acrobat reader

Hello all;

I have searched several times now for a way to permanently turn off the global view/page navigator or whatever it is call that appears in the upper right corner of Acrobat reader when I scroll a document.  Some might find it useful, I find it gets in the way and covers the text I am reading while supplying no value as a navigation aid. 

I cannot find anything that even references the little view box and gives it a name, much less tells me how to turn it off.

Help please. 

Thanks Much

Nick