I can’t remember how many times I have been called into a meeting for a rescue mission because the laptop used for the presentation went to sleep mode and no one in the meeting knows what the password is.
And here is a trick for you if you are in the same shoes as mine before.
Run the following command in either the Command Prompt window or the PowerShell window.
presentationsettings
And this pops up.

Check “I am currently giving a presentation” option, and click OK.
Or, even better, run the following to start the Presentation mode.
presentationsettings /start
And run the following to stop when the meeting is over.
presentationsettings /stop
This is also extremely useful if you have a long-scheduled job or script to run, which you don’t want to be interrupted because the laptop has to go hibernation mode in the middle.
It’s also worth noting that the PresentationSettings is off by default after a reboot. So if you enabled it and forget about the status of it, you can simply restart the computer.
Doesn’t work it seems on desktops. Darn!