@danielbeardsley When I fix the issue you mentioned in your previous comment, this logic will be moved to the branch on iFixit/ifixit, so maybe it'd be better to discuss this there. But, what do you think is the best solution to this?  

If I guessed where the shortcut would be to increase the size of something I would reach for the [+] key next to the [delete/backspace] key.  I wouldn't expect to have to press the shift key, and if I'm on a laptop or small keyboard I won't have any other [+] key.