It would be awesome to be able to control the participant screen beforehand.

Here are some features I would disable if participant screen settings were available:

1. I would disable slide visibility on participant screens.
   Students tend to look down at their screens during class, and it's hard for us to tell whether they're watching YouTube or actually viewing the slides.

2. I would disable the 'Sign in to save this presentation' option.
   I’m not comfortable with students saving my intellectual property without my consent.

3. I would disable the 'Attended' feature.
   I don’t want students to browse through my experimental slides or content prepared for future classes.