What functionality is missing? What is unsatisfying with the current situation?

I can't edit the basic font size of text being displayed on the handout page. Being as I plan to project this on a TV mounted behind me on the wall, and being that most of my players are not teens with the eyesight of a griffon it would be very nice and a substantial boon to accessibility for older players trying this method if this were allowed.  

How does this feature request address the current situation?

If full CSS editing isn't allowed it would be nice at least if this page obeyed the global font size settings.  

What are other uses for this feature request?

It's pretty narrow in scope but honestly I doubt it's too much of a fix and would make a lot of sense to help others looking to use the page in this way.