LilyPond Internals Reference: 3.1.129 VerticalAlignment

### 3.1.129 VerticalAlignment

VerticalAlignment objects are created by: Vertical_align_engraver.

Standard settings:

> `axes` (list):

>   `'(1)`

>   List of axis numbers. In the case of alignment grobs, this should contain only one number.

> `stacking-dir` (direction):

>   `-1`

>   Stack objects in which direction?

> `vertical-skylines` (pair of skylines):

>   `ly:axis-group-interface::combine-skylines`

>   Two skylines, one above and one below this grob.

> `X-extent` (pair of numbers):

>   `ly:axis-group-interface::width`

>   Hard coded extent in X direction.

> `Y-extent` (pair of numbers):

>   `ly:axis-group-interface::height`

>   Hard coded extent in Y direction.

This object supports the following interface(s): align-interface, axis-group-interface, grob-interface and spanner-interface.

#### Internals Reference