How do you save?

In the beta email it asks &quotdo you save manually?&quot[li]

I don’t see any option to save. Is there a shortcut?

Hit “Esc”. :) Come to think of it, that’s a very common convention in my experience, but I don’t know that you learn it anywhere…I wonder how I picked it up…

Huh, turns out that only works when docked. That’s what I was missing! I’d pressed escape many times (as is the convention), along with trying F5 etc, but to no success … because I wasn’t docked.