Theory By Hand is a new book from Fretboard Toolbox that shows how to build Major, minor, pentatonic, blues, and minor scales, and the chords that go with each key- all on one hand! Big Idea 2 is how to build Major pentatonic scales. See the location of the Major pentatonic scale notes, in any key, with a Fretboard Toolbox Complete Edition for guitar, mandolin, banjo, ukulele, tenor guitar, bass, and/or piano.