A way of softening minor chords, very common in pop music.
These three boxes are for the more experienced player who is comfortable with half barre (partial chords) and full barre chords.
Source: Minor 7
Full Barre
G# Guitar Chord
Chords In The Key Of F Sharp and G Flat Major
Probably the busiest key with all six sharps, barre chords are needed throughout unless a capo is used.
Source: Chords In The Key Of F Sharp