Presenter notes can help you recall important points you want to mention during a presentation. The notes don’t appear on the slide, but they can help you remember information about a slide’s graphics, charts, or anything else on the slide.
Click 
in the toolbar, then choose Show Presenter Notes.
In the slide navigator, click to select a slide, then type your notes in the white presenter notes area below the slide.
To change the the look of the text in your notes, select the text, click 
in the toolbar, then use the text controls in the sidebar on the right.
In the slide navigator, the thumbnails for slides with presenter notes have a small square in the top-right corner.
You can also add or edit your notes in the presenter display while playing your presentation in rehearse slideshow mode or on a separate display.
You can hide presenter notes if you want a little more room to work on the slide canvas.
To hide presenter notes, click in the toolbar, then choose Hide Presenter Notes.
You can also print your presenter notes along with your slides. See Print a presentation to learn more.