Banjo Fmaj7 chord (Sawmill)F major seventh on the 5-string banjo: 3 2 0 2, and 5 more shapes

Frets, string 4 to string 1: 3 2 0 2 (open position)

1. String 4 (D): 3rd fret, ring finger, F
2. String 3 (G): 2nd fret, index finger, A
3. String 2 (C): open, C
4. String 1 (D): 2nd fret, middle finger, E
5. String 5, the short g: open, G, not in the chord

Sounds: F A C E  ·  Fmaj7 is F, A, C, E (1 · 3 · 5 · 7)

The 5th string: the short g adds the 9th over Fmaj7, a colour rather than a clash.

Sawmill tuning: gDGCD, the short 5th string first, then strings 4 to 1.