You can add two chords per bar (measure). I'm working on expanding that so you can add up to four chords per bar, but this feature is still in development.
To add another chord to a bar, you can
Expand the chord length editor when in composition mode (select a chord)
Long-press a chord
👉 Tap the ✂️ scissor icon:
Expand the chord length editor when in composition mode (select a chord)
Long-press a chord See above for more instructions on this.
👉 Tap the 🗑 trash icon:
If there is only one chord in a bar, you can "delete" it by muting it. Read more