LilyPond Internals Reference: 3.1.71 NonMusicalPaperColumn

### 3.1.71 NonMusicalPaperColumn

NonMusicalPaperColumn objects are created by: Paper_column_engraver.

Standard settings:

> `allow-loose-spacing` (boolean):

>   `#t`

>   If set, column can be detached from main spacing.

> `axes` (list):

>   `'(0)`

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

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

>   `ly:paper-column::before-line-breaking`

>   Dummy property, used to trigger a callback function.

> `full-measure-extra-space` (number):

>   `1.0`

>   Extra space that is allocated at the beginning of a measure with only one note. This property is read from the NonMusicalPaperColumn that begins the measure.

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

>   `ly:separation-item::calc-skylines`

>   Two skylines, one to the left and one to the right of this grob.

> `keep-inside-line` (boolean):

>   `#t`

>   If set, this column cannot have objects sticking into the margin.

> `line-break-permission` (symbol):

>   `'allow`

>   Instructs the line breaker on whether to put a line break at this column. Can be `force` or `allow`.

> `non-musical` (boolean):

>   `#t`

>   True if the grob belongs to a `NonMusicalPaperColumn`.

> `page-break-permission` (symbol):

>   `'allow`

>   Instructs the page breaker on whether to put a page break at this column. Can be `force` or `allow`.

> `skyline-vertical-padding` (number):

>   `0.6`

>   The amount by which the left and right skylines of a column are padded vertically, beyond the `Y-extent`s and `extra-spacing-height`s of the constituent grobs in the column. Increase this to prevent interleaving of grobs from adjacent columns.

> `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, font-interface, grob-interface, item-interface, paper-column-interface, separation-item-interface and spaceable-grob-interface.

#### Internals Reference