Thank you very much for your answer. The problem is, I cannot get
the settings-manager to start. Running from the terminal I get the Message:
"ImportError: No module named pygtk". But the module is installed.
In arch forum with a similar case, I read that the executable should be changed to use python2, but I do not know how to do this.
Maybe there is a simple answer how to get the settings-manager to start.