[Zope] Zope-Documentation: Args

Hi, I've found quite a lot of doc about the Zope built-in-functions. But very often I miss information about the args that can be passed to the functions, e.g. "manage_changeProperties". You find a description of the function, an example passing REQUEST, but I had to guess that you can pass a map as well. Any help? Am I blind or stupid? Probably both :) Thanks in advance Horst