Assignable Devices and Functions

The Device column in the Cubase control assignment section lists the Cubase devices that you can control.
Command

Allows you to assign the Cubase commands to which a key command can be assigned. If you select Add Track in the Channel/Category column, and Audio in the Value/Action column, you can add audio tracks using your MIDI device, for example.

VST Quick Controls Manager (not in Cubase LE)
Midi Mixer
MMC Master
Mixer
Transport
Metronome
VST Mixer
Note

You can also control all VST Instruments that you added in the Project window, and that are listed in the Device column.