In music, a chord diagram (also called a fretboard diagram or fingering diagram) is a diagram indicating the fingering of a chord on fretted string instruments, showing a schematic view of the fretboard with markings for the frets that should be pressed when playing the chord.[1] Instruments that commonly use this notation include the guitar, banjo, lute,[2] and mandolin.
See also
Tablature, a related notation for the sequence of chords in a piece of music