Question about energy manager: what is presentation mode?

I am under Zorin lite I have this option in the energy manager , though I have set it "on" I don't know what is does..

It prevents the Screensaver, sleep or Hibernate from kicking on, in order to prevent the computer from shutting the screen off while making a Presentation, slide show, powerpoint, etc.
It can be useful for watching Youtube videos, too. :wink:

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