How do I set commenting permissions on a document?

Document Managers can specify view and add permissions independently on a per document basis. View and add permissions can be set to one of the following: 'Public','General Membership','Document Viewers','Approval Ballot Voters','Comment Managers' or 'No one'. Commenting permissions must match the document's sharing settings. A document's access restrictions are enforced throughout Kavi Groups and can be set or modified anytime during the document lifecycle.