We've seen how to create a dominant 7th chord by moving a single note of a diminished 7th chord. What happens if you move two chord tones down by a half-step? How about moving three notes? It turns out that these moves generate major 6th chords, respectively (a). The conventional voicing applications for such chords are over minor 7th or major & flat 5 chords (b). But armed with the knowledge that every note moved in a diminished chord is a root of a related dominant, you can apply major 6th and minor 6th voicings to their related dominant 7th chords, too. In (c) I apply major 6th chords to a C7 that are from the related dominant roots of A, G flat, E flat, and C.