How to customize Touch Bar on the Macbook Pro 13" when Mathematica is on

Whenever I use Wolfram Mathematica, the Touch Bar on my Macbook Pro has a "New Document" button. My question is, how do I make sure I don't have that button when I open Mathematica? It is annoying, as every time I reach to hit the

key, sometimes the "New Document" button gets tapped, resulting in a new document popping up. Thanks for any advice you have!