PTExternalAnnotManagerMode

enum PTExternalAnnotManagerMode				// Important: all collaborators need to use the same PTExternalAnnotManagerMode
{
e_ptuser_only,			// each user can only edit the annotations they created
e_ptadmin_undo_others,	// all the annotations can be edited, can undo yours and other's changes
e_ptadmin_undo_own		// all the annotations can be edited, can undo only your changes. Incremental save is not supported in this mode
}