Allows you to name an interface and enable or disable it.
The names help you keep track of what the actual port is connected to. The driver returns a name but after you connect something to it, you really want to know what the piece of gear is not the port name. This name shows up in all of the macro editors that output to the MIDI ports.
The "Enabled" check allows you to easily turn specific ports on and off. This can be very helpful when setting a system up.