Flatten Comments... flattens the annotations in case you want to make it impossible to change them

Summarize Comments... allows you to get a summary of all the comments associated with a PDF to view them as a new PDF Document, Rich Text Format, Plain Text or HTML Page.

Import Comments allows you to import comments and add it to a PDF document

Export Comments to Data File... allows you to export comments in order to publish or send them to someone

Show Comments allows you to select comments that you want to display from the list

Show Comments displays all comments  

Comments Styles Palette opens the palette with the list of comments’ styles