No Key Shortcut...

 From:  Grendel
I am trying to make key cuts for the tools and have followed aloong and I'm in the sidepane.html and found the ="booleans". What do I need to enter to assign it to a key(B)? Sorry, I'm not that familiar with HTML, a small pop up in the options tab would be great for non-tablet users to assign keys to the tools.