Click on Chords
The Green Dot is the 7th to make a *.*7 chord
<A> <Am> <Bb> <Bbm> <B> <Bm> <C> <Cm> <Db> <Dbm> <D> <Dm> <Eb> <Ebm> <E>. <Em> <F> <Fm> <F#> <F#m> <G> <Gm> <G#> <G#m>