Editing the Annotation Comment
Annotations can contain additional stored comment information. These can be used to provide additional details on the reason for then annotation being placed on the page.
From the comment bubble
An annotation's note can be edited by double-clicking directly on the annotation. This will display a small pop that will allow you to edit just the comment on the annotation. Type in the field to add, change, or delete the comment on the note. Once done click on the "x" or any where on the page to save the comment.
From the comments panel
Select the annotation from the Comments Panel, then double click on the annotation in the list you wish to add a comment to. Once you have completed the comment clicking elsewhere or pressing the Esc key.