As you work on your slideshow, you can add comments to slides. For example, you could use comments to remind yourself of changes you want to make to the slide. Or you can use comments to communicate with others with whom you are collaborating in developing a presentation. (Comments are different from presenter notes; to learn about writing notes that you can use to prompt you during your presentation, see Adding Presenter Notes.)
Comments are always on top of the slide canvas, so they may obscure parts of your slide. Simply drag the comments out of the way, hide them, or resize them.
You can move comments anywhere on the slide canvas. If you have your own presenter display while making a presentation, you can see your comments but your audience can’t. However, during your presentation you won’t be able to hide, move, or resize comments that might obscure parts of your slide in the presenter display.
To add a comment, click Comment in the toolbar or choose Insert > Comment. Type a note, idea, or reminder, and then drag the comment wherever you want to place it on the canvas.
To hide or show comments, click View in the toolbar and choose Hide Comments or Show Comments.
To resize a comment, drag the lower-right corner.
To delete a comment, click the X in the upper-right corner.
To format a comment, see instructions in Creating Outlined Text and Filling an Object with a Solid Color.
To print slides with comments showing, make sure the comments are visible on the slide canvas before you print.