Shortcuts to turn annotation toolbar ON/OFF

Is your feature request related to a problem? Please describe.
As a teacher (or really in most presentations), having the ability to annotate on the fly is key. However, it is annoying to have to click “Erase”, and then close the annotation toolbar every time I want to advance to the next slide on Powerpoint that I’m sharing with my audience.
Describe the solution you’d like
I would like keyboard shortcuts to do at least 2 things: (a) Turn the annotation toolbar on/off. (b) Erase all annotations