to view its annotations.If a post on an annotation discussion is inappropriate, you can flag it. The presentation’s owner will receive an email notification regarding the flagged post.
To report inappropriate posts on annotations:
1. Start
the presentation and click the Annotations button to view its annotations.
2. Navigate to the annotation you want and click Discussion.
3. Locate
the post you want to report, click the More button 
next to it, and select Flag as Spam or
Abuse.
4. In the Report post dialog box, select the reason you are reporting the post and click Report.
Report an inappropriate comment