How to Insert a Comment in PowerPoint
Adding a comment to a presentation is like attaching a sticky note to it. You can use PowerPoint’s comments feature to add suggestions, notes, or reminders to your presentations.
To edit a comment, simply click in the comment balloon and edit the text.
To jump between comments, use the Next and Previous buttons in the Comments group on the ribbon or in the Comments pane.
In addition to making your own comments, you can have a conversation by replying to comments made by other people.
If you no longer need a comment, delete it from the presentation.
To delete all comments, click the Delete button list arrow on the Review tab and select Delete All Comments and Ink in This Presentation.