LilyPond program-reference: 3.1.124 VerticalAlignment

### 3.1.124 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.

> `after-line-breaking` (boolean):

>   `ly:align-interface::stretch-after-break`

>   Dummy property, used to trigger callback for `after-line-breaking`.

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

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

>   Hard coded extent in Y direction.

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

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

>   Hard coded extent in X direction.

> `stacking-dir` (direction):

>   `-1`

>   Stack objects in which direction?

> `padding` (dimension, in staff space):

>   `0.5`

>   Add this much extra space between objects that are next to each other.

> `vertical-skylines` (unknown):

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

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

> `max-stretch` (number):

>   `0`

>   The maximum amount that this `VerticalAxisGroup` can be vertically stretched (for example, in order to better fill a page).

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

#### Internals Reference