Watch the A7 Across String Sets online guitar lesson by Pat Martino from The Nature of Guitar
With the A7 chord, we'll see how to move it over one string set, like a child would, to see what it reveals. By doing so and moving one note up, we get another version of the dominant 7th chord. The same thing happens when I move to the next set in ascent.
We'll discover how this works in ascent and in descent in this lesson. These are automatic transfers of inversions. The same thing happens for the non-adjacent sets.