guitar chord
C♯m7
Minor triad with a minor seventh. The same four notes as a major sixth chord a third above.
Written the other way round it is D♭m7 — the same twelve keys on a piano, a different piece of notation.
Every fingering that fits a hand
x42100
easy
x46600
easy
x42400
easy · no 5
x46400
moderate · barre
x42404
moderate
What is true of it
C♯m7 is C♯, E, G♯ and B — 1, b3, 5 and b7 counted from C♯.
These are also the notes of E6/C♯. Which name is right depends on what is underneath and what came before — the notes alone do not decide.
On an instrument that cannot reach all 4, the 5 goes first, in that order.
The easiest of the 5 fingerings below is x42100: 3 fingers, held at the 1st fret.
None of them uses an open string, so this chord moves up the neck unchanged — the same shape 1 fret higher is the chord a semitone above.
1 of the 5 need a barre.
1 string stays silent.
Where its notes are on the neck
The brass dots are C♯, the root. Everything else is a chord tone with its degree printed in it.
With a different note underneath
C♯m7/E
042100
C♯m7/G♯
446400
C♯m7/B
x22120
An inversion is the same chord with a different note lowest. The name changes to a slash name because the bass is what a listener hears as the foundation.