Customising Detailed navigation.

Hi there,

Wondering if someone can point me in the correct direction.

In EP 6.0, I am trying to customise the highlight of the selected Item in the detailed navigation to extend to the outside of the container just as has been done on http://help.sap.com/nw04/

but I cannot see where this is done and only the text is highlighted by default..

Thanks

Olaf Morgan