Banjo Am7 chord (Open G)A minor seventh on the 5-string banjo: 2 2 1 2, and 4 more shapes

Frets, string 4 to string 1: 2 2 1 2 (first position) · 5th string completes it

1. String 4 (D): 2nd fret, middle finger, E
2. String 3 (G): 2nd fret, ring finger, A
3. String 2 (B): 1st fret, index finger, C
4. String 1 (D): 2nd fret, little finger, E
5. String 5, the short g: open, G, in the chord

Sounds: E A C E  ·  Am7 is A, C, E, G (1 · ♭3 · 5 · ♭7)

The 5th string: the short g is the ♭7 of Am7, so let it ring.

Open G tuning: gDGBD, the short 5th string first, then strings 4 to 1.