The "substitute chord symbol" mechanism should appear in the UI at the bar level, using a specific bar renderer, instead of at the chord symbol level. Though we probably can keep the "substitute" info at the chord level, with the constraint that all subsitute chord symbols of a given bar must have the same "marker" rule.
The "substitute chord symbol" mechanism should appear in the UI at the bar level, using a specific bar renderer, instead of at the chord symbol level. Though we probably can keep the "substitute" info at the chord level, with the constraint that all subsitute chord symbols of a given bar must have the same "marker" rule.