Nautilus is not the file manager anymore in Elementary OS Luna - or it has change name to Pantheon-files. Cannot find its settings.
How to see invisible items?
Well, the Elementary devs are not going to release their own Luna in the foreseeable future--they are saying that their distro is not like any other and it must be without bugs to come out.
They even said, if I move Luna Beta 1 to Quantal and/or Raring, I would get updates etc.
So, I took the challenge and build "their" Luna with Quantal mini.iso and with their Quantal applications.
The first beta edition of what will become Elementary OS Luna has been released. Luna is a bold attempt to revamp and completely retool Jupiter, the distribution’s first edition.