D dominant seventh chord
D7 chord for piano with keyboard diagram.
Explanation: The D dominant seventh is a four note chord. You can see the four notes of the D seventh chord marked in red color. The chord is often abbreviated as D7.
Theory: The D seventh chord is constructed with a root, a major third, a perfect fifth and a minor seventh.
Fingerings: little finger, middle finger, index finger, thumb (left hand); thumb, index finger, middle finger, little finger (right hand).
Notes are D - F# - A - C
D7 - inversions
Explanation: The images below show the three inversions of the D dominant seventh chord. D7/F# is a D dominant seventh with F# as the bass note, D7/A is a D dominant seventh with A as the bass note and D7/C is a D dominant seventh with C as the bass note. Note that the fifth sometimes are omitted.