You can enable comments by opening the properties of an archive and, on the General tab, selecting FotoWeb in the Other section.
FotoWeb comments are available within FotoWeb only, and a user needs to be authenticated to be allowed to comment on assets in the archive.
In addition, users need to have Comments rights in the archive's access list to be allowed to leave comments on archives and their assets. For more information, see Setting archive access and permissions.
Note: When copying or moving assets, comments are not included.