In PowerPoint Online, toggle the notes pane on and off by selectingView>Notes.
In the Slide pane, pick the thumbnail of the slide you want to add a note.
Place the cursor in the Notes pane.

The text in the Notes pane reads,Click to add notes.
If you don’t see the Notes pane, go toViewand selectNotes.
On a Mac, drag the bar below the slide upward to reveal the notes section.

key in or paste your notes into the Notes pane.
Save the changes to your presentation.
Go toSlide Showand selectUse Presenter View.

snag the monitor that you want to use to view your speaker notes in theDisplay Settingsdialog box.
Place a check next toThis is my main monitor.
If available, selectFrom Current Slide,Custom Slide Show,Present Online, orBroadcast Slide Show.

Each of these views displays your slideshow notes during the presentation.
PowerPoint for Mac works a little differently than the Windows version.
To see your notes during a presentation, go toSlide Showand selectPresenter View.
Notes in a PowerPoint slide are hidden during the presentation and only visible to the one presenting the slides.
Presenter View works only if your box is connected to another display.
While in Presenter View, you’ll see the current slide, the upcoming slide, and your notes.
To exit Presenter View, and end the presentation, selectEnd Slide Showat the top of the screen.
If you don’t see that option, right-poke the slideshow and selectEnd Show.