I discovered I can use these shapes to play up and down the top 3 strings and now its a little bit like playing a piano.
They can also be used as shells for example, playing a major triad with the root a whole tone down from whatever is playing in the bass is a minor 11 shell, or playing a major triad with the root being the major 3rd of whatever is playing in the bass is a dominant 7 shell (I think).
Root on the G String (3rd String)
- Major: G: [R], B: [Same fret], E: [2 frets down]
- Minor: G: [R], B: [1 fret down], E: [2 frets down]
Root on the B String (2nd String)
- Major: G: [1 fret down], B: [R], E: [1 fret down]
- Minor: G: [1 fret down], B: [R], E: [2 frets down]
Root on the E String (1st String)
- Major: G: [1 fret up], B: [Same fret], E: [R]
- Minor: G: [Same fret], B: [Same fret], E: [R]