C# major 11th chord

C#maj11 chord for piano with keyboard diagram.
Explanation: The C sharp major eleventh is a six-note chord. For practical reasons the chord is normally played with omitted notes and/or inverted. It is often abbreviated as C#maj11 or C#maj9(#11). In the latter case, the chord is played with a raised eleventh to avoid dissonance with the 3rd.
Omissions: C#maj11(no5): C# - F - C - D# - F#.
Theory: The C# major eleventh chord is constructed by extending the major ninth chord with a major eleventh note.

C#maj11