Referencia de la notación de GNU LilyPond: 4.4.4 Two-pass vertical spacing

### 4.4.4 Two-pass vertical spacing

Nota: El espaciado vertical en dos pasadas está obsoleto y se eliminará en una versión futura de LilyPond. Ahora los sistemas se amplían automáticamente en un solo paso. Véase Vertical spacing inside a system.

In order to automatically stretch systems so that they should fill the space left on a page, a two-pass technique can be used:

1. In the first pass, the amount of vertical space used to increase the height of each system is computed and dumped to a file.
2. In the second pass, spacing inside the systems are stretched according to the data in the page layout file.

The `ragged-bottom` property adds space between systems, while the two-pass technique adds space between staves inside a system.

To allow this behavior, a `tweak-key` variable has to be set in each score `\layout` block, and the tweaks included in each score music, using the `\scoreTweak` music function.

>     %% include the generated page layout file:
>     \includePageLayoutFile

>     \score {
>       \new StaffGroup <<
>         \new Staff <<
>           %% Include this score tweaks:
>           \scoreTweak "scoreA"
>           { \clef french c''1 \break c''1 }
>         >>
>         \new Staff { \clef soprano g'1 g'1 }
>         \new Staff { \clef mezzosoprano e'1 e'1 }
>         \new Staff { \clef alto g1 g1 }
>         \new Staff { \clef bass c1 c1 }
>       >>
>       \header {
>         piece = "Score with tweaks"
>       }
>       %% Define how to name the tweaks for this score:
>       \layout { #(define tweak-key "scoreA") }
>     }

For the first pass, the `dump-tweaks` option should be set to generate the page layout file.

>     lilypond -dbackend=null -d dump-tweaks <file>.ly
>     lilypond <file>.ly

#### Véase también

Fragmentos de código: Spacing.

Other languages: English.

#### Manual de referencia de la notación