Record pop-up menu: Choose whether to record only the Internal MIDI In signal or both MIDI input and Internal MIDI In. (Available when Internal MIDI In is set to anything other than Off.)
MIDI In Channel pop-up menu: Choose a MIDI channel to receive track input from only that channel, or choose All to receive input from all MIDI channels.
MIDI Out Channel pop-up menu: Choose the MIDI channel for the track output; choose All to send to all MIDI channels, with each MIDI signal keeping its original channel; or choose Round Robin to send each outgoing MIDI message to the next higher MIDI channel (from 1 to 16, then starting again with channel 1).
Freeze Mode pop-up menu: Choose Source Only to freeze the track signal without effect Enable Complete Features is selected in Logic Pro > Settings > Advanced, additional track parameters are available, including Channel, Freeze Mode, Q-Reference, Delay, Flex Mode, and Staff Style parameters.
In the Logic Pro PDF
Control Surfaces Support Guide: PDF