Banjo B chord (Open D)B major on the 5-string banjo: 1 0 2 1, and 6 more shapes

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

1. String 4 (D): 1st fret, index finger, D♯
2. String 3 (F♯): open, F♯
3. String 2 (A): 2nd fret, ring finger, B
4. String 1 (D): 1st fret, middle finger, D♯
5. String 5, the short f♯: open, F♯, in the chord

Sounds: D♯ F♯ B D♯  ·  B is B, D♯, F♯ (1 · 3 · 5)

Found in: B major (I), B mixolydian (I), E major (V), F♯ major (IV), F♯ mixolydian (IV), D♭ mixolydian (♭VII)

The 5th string: the short f♯ is the 5th of B, so let it ring.

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