only showing Switchboard on startup

I would like only the main switchboard to be visible on start-up but at the
moment a "Contacts list" form (inherited from the Contacts template in Access
2007) appears on a second tab (I'm not at ths stage of wanting it full-screen
yet - though that will come).

I have followed the instructions found on the boards:
Office button Access Options Current database but there isn't anything
that I can see related to startup.
In Display Form, I have selected "Switchboard" from the drop down list but
can't see any way of unselecting Contacts List.

Is there a way to "lose" the Contacts List" at startup? (Preferably nice and
simple!)

Many thanks