The treble clef refers to a table that records the pitch of an instrument, usually including the note names and corresponding pitch information of various instruments. In the treble and bass clefs, there is sometimes a phenomenon of symmetry formed by note names.

Symmetry refers to a graphic structure that is symmetrical on a certain center line, and the shapes on both sides of it are symmetrical. In the treble and bass clefs, the phenomenon of forming symmetry with note names means that the center line of the clef is symmetrical, and the shape of the note names on both sides is symmetrical. This symmetry usually occurs because the staff is divided according to semicent pitches in music theory.

In the high and low clefs, it is very common to form symmetry with note names. This symmetry can help players find the required notes faster, and also facilitates music understanding and creation