You can record audio to multiple tracks simultaneously. This is done by record-enabling the required arrange tracks, then starting to record. This allows you to record several instruments at once, placing each instrument on a separate arrange track.
Click the Record Enable button on each arrange track you want to record to.
Important: You cannot record-enable tracks that are set to the same input. Each track needs to be set to a different input.
Set the playhead to the point where you want recording to start.
Click the Record button in the Transport bar (or use the corresponding key command, default assignment: *).
Stop recording by clicking the Stop button in the Transport bar (or press the Space bar).
You now have a new audio region on each of the record-enabled tracks.