When the Metadata Editor is opened, e.g. in MediaPortal, metadata will be visible, but not editable. The Edit button is only be active if the current user has the functional right for editing metadata.
When the "Edit" mode is active, users can edit metadata values. Clicking on the "Save" option will have all the changes saved.
Roles and Permissions
Group members which have the "PF_MetadataEditor" role assigned to their group are able to activate the edit mode in the Metadata Editor. The Metadata Editor is provided by VidiFlow and can be embedded in MediaPortal.
Users without that role can only see the metadata values, but are not allow to activate the edit mode.