C# 11th chord

C#11 chord for piano presented by keyboard diagrams.
Explanation: The C sharp eleventh is a six-note chord. To avoid dissonance the third (F) is normally omitted. The chord is also often played inverted. The chord is abbreviated as C#11.
Omissions: C#11(no3): C# - G# - B - D# - F#; C#11(no9): C# - F - G# - B - F#.
Theory: The C# eleventh chord is constructed by adding a third to a ninth chord.