> because I've got a very quick response on my 1st question regarding
> "Change attributes" here is anonther one:

Don't stress it too much ;-)

> I've defined 2 attributes with "Change attribute" / "List Change attribute" (see configuration).
> Because this values are build on other attributes I want to hide these attributes in 
> NEW / EDIT mode. How is this possible?

Show Attributes = Admin, Hostname, IP-Adresse, Funktion, RIB Hostname, RIB IP

hides the attributes in the New/edit mode, but unfortunately also in the detailed view.