D♭ Major 7th :: D♭ F A♭ C

B
F♯
D
A
7
D♭
5
3
7
D♭
3
7
5
D♭
3
5
7
3
D♭
5
⬤ ⬤
⬤ ⬤
D Major 6th :: D F♯ A B

B
F♯
D
A
6
3
D
5
6
D
5
3
6
D
3
5
D
6
3
5
⬤ ⬤
6
3
D
5
⬤ ⬤