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 ...
Taking a theoretically identical chord and juggling its notes ... because it’s such a nice key on the guitar, but you’ll notice below that a Cmaj7 has crept in on Example 5, too.