How to get rid of the System Menu Entry in WebGUI

Hello,

is there a service-parameter for the WebGUI Service of ITS, to get rid-of the System-Entry in the Menu.

- we use ITS 6.20 (SP9?, the latest version)

- we use the old frog design

- we can't use EWT

- we won't use the streamlined design

Any help appreciated.

Frank