Three Way Circuit Control

I am trying to configure swithes from Frostdale to work as a three way circuit i.e. two switches and a light on the same circuit.

My electrician has installed the swiches and one on each circuit works. I believe that I have to configure the second switch on the vera via triggers and scenes. However, I have not be able to locate anywhere how to do that. Is there someone who can point me in the right direction.

Regards,

Carsten