LilyPond program-reference: 3.1.53 LeftEdge

### 3.1.53 LeftEdge

LeftEdge objects are created by: Break_align_engraver.

Standard settings:

> `break-align-symbol` (symbol):

>   `'left-edge`

>   This key is used for aligning and spacing breakable items.

> `break-align-anchor` (number):

>   `ly:break-aligned-interface::calc-extent-aligned-anchor`

>   Grobs aligned to this break-align grob will have their X-offsets shifted by this number. In bar lines, for example, this is used to position grobs relative to the (visual) center of the bar line.

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

>   `'(0 . 0)`

>   Hard coded extent in X direction.

> `non-musical` (boolean):

>   `#t`

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

> `break-visibility` (vector):

>   `#(#t #f #t)`

>   A vector of 3 booleans, `#(end-of-line unbroken begin-of-line)`. `#t` means visible, `#f` means killed.

> `space-alist` (list):

>   `'((custos extra-space . 0.0) (ambitus extra-space . 2.0) (time-signature extra-space . 1.0) (staff-bar extra-space . 0.0) (breathing-sign minimum-space . 0.0) (clef extra-space . 0.8) (first-note fixed-space . 2.0) (right-edge extra-space . 0.0) (key-signature extra-space . 0.0) (key-cancellation extra-space . 0.0))`

>   A table that specifies distances between prefatory items, like clef and time-signature. The format is an alist of spacing tuples: `(break-align-symbol type . distance)`, where type can be the symbols `minimum-space` or `extra-space`.

This object supports the following interface(s): item-interface, break-aligned-interface and grob-interface.

#### Internals Reference