in the top-left corner of the player to
view all annotations in the presentation.Annotations can only be deleted that you own. Before you can delete an annotation, you must delete all associated discussion posts.
To delete annotations on a presentation:
1. Navigate to the presentation’s page and click the presentation’s Play button.
2. Click
Annotations in the top-left corner of the player to
view all annotations in the presentation.
3.
Navigate to the annotation you want to delete. Then click More 
.
4. Click Delete.
Delete annotation
On some presentations, you cannot
delete an annotation once it has been added. For more information, contact your
administrator.