### 3.2.111 staff-symbol-referencer-interface

An object whose Y position is meant relative to a staff symbol. These usually have `Staff_symbol_referencer::callback` in their `Y-offset-callbacks`.

#### User settable properties:

> `staff-position` (number)

>   Vertical position, measured in half staff spaces, counted from the middle line.

This grob interface is used in the following graphical object(s): AmbitusNoteHead, Arpeggio, Beam, Clef, CueClef, CueEndClef, Custos, Dots, KeyCancellation, KeySignature, MultiMeasureRest, NoteHead, Rest, TabNoteHead and TrillPitchHead.

#### Internals Reference v2.18.2 (稳定分支).