Menu titel i headline of page Theme Graphene

I use Graphene and ages ago I switched on to show the menu item in the header of the according page again.
Now: Where and how can I switch off this function? I don’t find it.
look at an example at
https://civv-info.org/attuale-informazioni-current-new-information-aktuelles/regatten-und-manifestationen-voga-veneta-in-venedig-2015/?lang=en