### 1.1.49 OverrideProperty

Extend the definition of a graphical object.

Syntax: `\override` [ context `.` ] object property `=` value

Properties:

> `iterator-ctor` (procedure):

>   `ly:push-property-iterator::constructor`

>   Function to construct a `music-event-iterator` object for this music.

> `name` (symbol):

>   `'OverrideProperty`

>   Name of this music object.

> `types` (list):

>   `'(general-music layout-instruction-event override-property-event)`

>   The types of this music object; determines by what engraver this music expression is processed.

> `untransposable` (boolean):

>   `#t`

>   If set, this music is not transposed.

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