LilyPond Internals Reference: 3.1.32 DotColumn

### 3.1.32 DotColumn

DotColumn objects are created by: Dot_column_engraver and Vaticana_ligature_engraver.

Standard settings:

> `axes` (list):

>   `'(0)`

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

> `direction` (direction):

>   `1`

>   If `side-axis` is `0` (or `#X`), then this property determines whether the object is placed `#LEFT`, `#CENTER` or `#RIGHT` with respect to the other object. Otherwise, it determines whether the object is placed `#UP`, `#CENTER` or `#DOWN`. Numerical values may also be used: `#UP`=`1`, `#DOWN`=`-1`, `#LEFT`=`-1`, `#RIGHT`=`1`, `#CENTER`=`0`.

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

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

>   Hard coded extent in X direction.

This object supports the following interface(s): axis-group-interface, dot-column-interface, grob-interface and item-interface.

#### Internals Reference