Dmaj7/C♯ Piano Chord
Dmaj7/C♯ is a D Major 7th chord played over a C♯ bass note. Because C♯ is the 7th of D Major 7th, Dmaj7/C♯ is simply D Major 7th in 3rd inversion, the same notes with the 7th moved to the bottom.
The dark key is the bass note (C♯); the coloured keys are the D Major 7th chord tones.
Notes in Dmaj7/C♯
Low to high: C♯ (bass) , then D – F♯ – A – C♯.
How to play Dmaj7/C♯
Play the bass note C♯ low in your left hand, and the D Major 7th chord (D – F♯ – A – C♯) in your right. Because it's an inversion, the bass is already one of the chord tones: you're just voicing D Major 7th with its 7th on the bottom.