Pace, Pause, Hide Screens

Pace - Restrict screens when students have a shared link. Sometimes, I have a worked-out example on the next screen. I don't want students to see this. Otherwise, they will cheat and just copy the answer. Also, I need to sometimes need to do a Lumio lesson in 2 days and want to keep the same file.
Pause/Unpause - Don't let students update an answer to an individual handout. I need to see student work before a student is allowed to update it. Also, great for pausing HW after due date.
Hide - Hide a screen from a student temporarily or hide screen with teacher notes. The teacher can see it and not student.
Turn off audio on/off - Turn off audio while teaching in class. Some students will play audio in class to just disrupt class.