[Zope] Ordering of the items in manage views

I don't know if this is a dummy question: How can I control the order of the entries in the Contents view of the manage screens ? I guess this is currently equivalent to the question how to control the default sort order of items in a folder. The problem is as follows (and the ought to be quite a common problem, I guess): Let's say I'running a quite basic web site, just folders and documents and basic navigation elements ala tree. User can add/remove/edit documents and folders by using the standard Zope managment interface, but how can they control in which orders the entries of the tree are presented ? Suppose I want to add a new folder somewhere in the middle of the tree, can I do that ? Gregor