Raising the open third string to G# at the 1st fret makes this an E7 chord. By combining the root (C), 3rd (E), 5th (G) major 7th (B) and duplicate 3rd (E), we create a Cmaj7. To change this to a ...

Harmonic minors use the relative major key signature and raise the seventh note of the scale. For example, in A harmonic minor there are no sharps or flats other than the raised seventh of G#.