This thread is kinda old but I’m going to answer it as best as I since I’m new to 6, but used SX extensively so I know a bit about Cubase. In SX, they used to have an Audition Channel strip that you could turn on from the Studio tab in VST Connections. That’s gone now. What you can do instead:
Open VST connections and go to the Studio tab. If there isn’t a Monitor Channel, create one in stereo. Set the output for the Monitor Channel to your hardware driver. This will take the output away from your main output in the Output tab and redirect it to the Control Room. Now open your Control Room Mixer and you’ll get a floating output channel that has a CLIK button. Make sure that’s enabled. Under it is a small digital display that enables you to control the output volume of the metronome.
I’d really like to dock this floating window in the mixer because I really don’t want another floating window. I also prefer the way I used to do it in SX because I don’t do my studio routing in software, I do it in hardware. I’d like to keep the option rather than being forced to do it this way.
A big suggestion tho. Only use the metronome to help you get the tempo correct. Make a scratch track with the beats in Groove Agent and use that as your metronome. It’s super easy and you’ll get your groove as well as your metronome in 2 minutes which is a better foundation to work from.