CTL + ALT + Shift + H

 
As of recent, I found myself with the tedious chore of leaving my screen alone when sharing on behalf of some participants. I'm not sure if it's a bug that's only happening on new computers, because my old laptops aren't experiencing the same issue, but black boxes appear on other participants' screen when sharing videos and/or images.

Until Zoom fixes this problem, the only solution is to hold CTL + ALT + Shift, and click H.

This renders all menu controls to completely disappear from everyone's screen, including your own. You won't be able to find any of your controls until you repeat the command:

CTL + ALT + Shift + H

Allowing you access to everything, the black boxes return, and I hope it'll be a temporary action before the presentation is ruined.

If you're not experiencing this, then disregard what I mentioned. Otherwise, please share this with your coworkers and associates, and have a good meeting!