Banjo Am chord (Open D)A minor on the 5-string banjo: 2 3 3 2, and 3 more shapes

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

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

Sounds: E A C E  ·  Am is A, C, E (1 · ♭3 · 5)

Found in: G major (ii), C major (vi), G mixolydian (ii), D mixolydian (v), C mixolydian (vi), G dorian (ii)

The 5th string: the short f♯ adds the 6th over Am, a colour rather than a clash.

With a capo: on the 2nd fret it’s 0 1 1 0 (frets counted from the capo), an open Gm shape. Spike the 5th string at the 7th fret to keep it in tune with the capo.

Open D tuning: f♯DF♯AD, the short 5th string first, then strings 4 to 1.