All you can do here is define the system device which will be used.
Check this if you want to access the assignment in a low-level manner (not often needed).
The device you want to use for low-level access with this assignment.
Check this if you want to use the high-level access (for printer spooling services).
Where to redirect the high-level data flux.
It may be a printer spooler or even a device directly.