Function Keys F5 in Microsoft Powerpoint

In Powerpoint, F5 starts a slideshow from the beginning.
If you want to start a slideshow from a different slide, go to the relevant slide and press Shift + F5.
Press Alt + F5 to start a slideshow from the beginning in Presenter View. Presenter view lets you look at your presentation with your speaker notes on one screen (your laptop, for example), while the audience views the notes-free presentation on a different monitor.
To start a slideshow in Presenter View from the current slide (rather than the first slide), press Shift + Alt + F5.