LilyPond Internals Reference: 3.2.72 ledger-line-spanner-interface

### 3.2.72 `ledger-line-spanner-interface`

This spanner draws the ledger lines of a staff. This is a separate grob because it has to process all potential collisions between all note heads. The thickness of ledger lines is controlled by the `ledger-line-thickness` property of the `StaffSymbol` grob.

#### User settable properties:

`gap` (dimension, in staff space)

  Size of a gap in a variable symbol.

`length-fraction` (number)

  Multiplier for lengths. Used for determining ledger lines and stem lengths.

`minimum-length-fraction` (number)

  Minimum length of ledger line as fraction of note head size.

#### Internal properties:

`note-heads` (array of grobs)

  An array of note head grobs.

This grob interface is used in the following graphical object(s): `LedgerLineSpanner`.

#### LilyPond – Internals Reference v2.24.4 (stable-branch).