Can I use NI S series Mk3 keyboard to control Main Out volume?

Hi there, does anyone know a way of directly controlling Cubase Main Out volume using the rotary controllers on the Native Instruments S Mk3 keyboard?
It only seems to support Instrument/Audio ‘tracks’ etc.
I 'm using a work around by creating a Group Track and routing everything through this. This then shows up on the DAW Track section on the keyboard. Works but not ideal.

I have a mk2 but try pressing shift and the right arrow key while in mixer mode. Works for me. It should bring the master channel into view on the rhs.

Thanks for the reply - it was a good shout but didn’t work unfortunately! There must be a reason why its not showing?