I'm really liking the idea of hovering over a note and seeing its function in the chord (3rd, flat 9th etc.). Very educational. If that's what you mean...

Terminology: I think what may throw some musicians reading your request is the term 'chord stack'. It's fine in this usage but to me, a stacked chord is another way of referring to a polychord, i.e., stacking a triad on top of another triad. Example EMaj9/Cm7


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