Banjo C♯ chord (Open D)C♯ major on the 5-string banjo: 3 2 4 3, and 2 more shapes

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

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

Sounds: E♯ G♯ C♯ E♯  ·  C♯ is C♯, E♯, G♯ (1 · 3 · 5)

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

The 5th string: the short f♯ rubs against the E♯ in this shape, a semitone away: some players let it ring, some skip it.

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