Arpeggiate chords
Turn a section's chords into an arpeggio from the section menu. Pick the pattern (up, down, up and down, broken, Alberti, ballad, root pedal, octave bounce or climb), the note rhythm (8th notes, 16th notes, tresillo or gallop) and one or two octaves, then apply it to one section, every section of the same type, or the whole song. It plays on the song's instrument as a melody layer you can edit like any other, and the chords can keep playing under it or go quiet. Press Preview to hear it before you apply it.