Blocking student access to live use of PowerPoints
When a teacher is trying use a PowerPoint in the meeting students should not be able to play around with it at the same time. Students should only be able to download the file to be worked through.
I had students continuously messing around with the PowerPoint while I was trying to teach. It becomes counter-productive.
John Camuyong commented
If you use the Live Event option instead of a meeting, participants will be limited to the Q&A Chat, and only you, the Presenter or Producer can manipulate what's being shown on the screen, including PowerPoint presentations.