The Comment toolbar provides controls for displaying and adding comments.
Click Show Comments to turn comment display on or off for screen display or printing.
When Show Comments is on, all comments appear and the comment bubble floats in the right margin in line with the cursor. Clicking on the comment bubble inserts a comment.
When Show Comments is off, comments are not visible and the new comment bubble does not appear in the right margin. To insert a comment in this situation, use the Add Comment control on the toolbar. After you insert a comment, Show Comments is set to on.