The Users section contains a list of users configured for that particular exhibition, as well as the ability to edit or remove users.
Admins
To edit or manage content for an exhibit, you will need to be added to the exhibit as an "Admin" or "Curator". Admins have access to additional configuration options, including managing users, configuring search, adding custom metadata fields, and etc.
Curators
(...Viewers?!)
Next: Configuration: Metadata