### 3.2.132 volta-bracket-interface

Volta bracket with number.

#### User settable properties:

> `thickness` (number)

>   Line thickness, generally measured in `line-thickness`.

> `height` (dimension, in staff space)

>   Height of an object in `staff-space` units.

> `shorten-pair` (pair of numbers)

>   The lengths to shorten a text-spanner on both sides, for example a pedal bracket. Positive values shorten the text-spanner, while negative values lengthen it.

#### Internal properties:

> `bars` (array of grobs)

>   An array of bar line pointers.

This grob interface is used in the following graphical object(s): VoltaBracket.

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