x737 Switch between COM radios and connect to second voice room on VATSIM

[vtremsin10]

Hello,

 

I was looking for a way to listen to the ATIS of the destination airport while flying on VATSIM. To do this, I have to connect with my COM2 radio. However, I cannot hear any ATIS. I think that I have to switch between the radios somehow, but I don't know how.

Can someone please tell me how to switch between radios on the x737?

 

Thank you in advance...