Just don't try to annotate the screen (or let a viewer do it). I ended up with a blank screen over everything (even the task switcher) and no way to quit. Fortu

Just don't try to annotate the screen (or let a viewer do it). I ended up with a blank screen over everything (even the task switcher) and no way to quit. Fortunately I had a keyboard shortcut to launch a new terminal, so used that then typed "killall zoom<enter>". It worked :D