You can use the Chord and Transposition tracks to edit the playback transposition of MIDI events and Apple Loops over time.
The Transposition track contains nodes that are connected by vertical and horizontal lines. Each node represents a global transposition event, which determines the global transposition value until the playhead reaches the next transposition event during playback.
Transposition events are closely linked to the chord root notes in the Chord track. If you create or alter a transposition event, the amount of pitch shift is immediately reflected by the the chord root notes in the Chord track—and vice versa.
The zero position of the Chord and Transposition tracks is determined by the current key signature in the Signature track. If the key signature changes during a project, the zero position of the Chord and Transposition tracks changes accordingly.