https://mail.google.com/mail/help/intl/en/promos/blue/index.html

Blame it on "Mobile First" or "Mobile Upwards" architecture, but--god Damn it!--if I wanted to be restricted to a tiny little compose box, I sure-as-fuck wouldn't be using my desk top!

Real Gmail help question: How do I make this box bigger?  How do I make my compose window big enough to actually use?