Banjo Dm chord (Double C)D minor on the 5-string banjo: 2 2 2 3, and 3 more shapes

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

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

Sounds: D A D F  ·  Dm is D, F, A (1 · ♭3 · 5)

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

The 5th string: the short g adds the 4th over Dm, a colour rather than a clash.

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

Double C tuning: gCGCD, the short 5th string first, then strings 4 to 1.