Has anyone figured out where the NAV/GPS switch is?

[tb10driver]

Archer III Demo in FSX

Maybe a senior moment, but has anyone figured out where the NAV/GPS switch is? Using the CDI pushbutton on the default GNS530 to display a GPS approach on the HSI has no effect. It remains in VOR/LOC ILS mode.

Thanks,
Dave

[tb10driver]

No worries, I've fitted a Cessna Nav/GPS switch into the panel. Now I can get a GPS indication in the HSI.

Dave

[Zigarten]

Just in case anyone is looking for it, it seems to be right under the control column.