How to put my motorhome dimensions U Connect 5?

dixi Registered Users Posts: 2
Apprentice Traveler
edited January 2019 in Built in car navigation
I have a tomtom unconnected 5" radio nav fitted to a Peugeot boxer motorhome and I am unable to put in my vehicle dimensions ie hight,lenth,width ,any suggestions please as there is nothing in setup menu or any of the other pages.