OK, I see the edit and delete (in the edit page) options now, sorry, they were there before obviously. But I still can't find the option for user to set an album cover - his own category's image:
Content visible to verified customers only.
I guess the Admin Options are not seen by a user no matter what permission I give him? But where else can I find that option? Of course a user wants to set his own album's cover (owned category's image).
The Admin Options in the screenshot are not visible to the test user account, only to the admin account.