@menu
* Line breaking::
* Page breaking::
-* Explicit breaks::
@end menu
@node Line breaking
@subsection Line breaking
-@cindex line breaks
+@funindex \break
+@funindex \noBreak
+@funindex \autoBreaksOff
+@funindex \autoBreaksOn
+@funindex \autoLineBreaksOff
+@funindex \autoLineBreaksOn
+@cindex manual line breaks
@cindex breaking lines
Line breaks are normally determined automatically. They are
The @code{\noBreak} command forbids a line break at the bar line
where it is inserted.
+Within a score, automatic line breaking is prevented within music
+lying between @code{\autoLineBreaksOff} and @code{\autoLineBreaksOn}
+commands. If automatic page breaks should also be prevented, the
+commands @code{\autoBreaksOff} and @code{\autoBreaksOn} should be
+used. Manual breaks are unaffected by these commands. Note that
+inhibiting automatic line breaks may cause music to run over the
+right margin if it cannot all be contained within one line.
+
+Automatic line breaks (but not page breaks) may be enabled at single
+bar lines by using @code{\once \autoLineBreaksOn} at a bar line.
+This identifies a permitted rather than a forced line break.
+
The most basic settings influencing line spacing are @code{indent}
and @code{line-width}. They are set in the @code{\layout} block.
They control the indentation of the first line of music, and the
@predefined
-@funindex \break
@code{\break},
-@funindex \noBreak
-@code{\noBreak}.
+@code{\noBreak},
+@code{\autoBreaksOff},
+@code{\autoBreaksOn},
+@code{\autoLineBreaksOff},
+@code{\autoLineBreaksOn}.
@endpredefined
+@snippets
+
+@lilypondfile[verbatim,quote,ragged-right,texidoc,doctitle]
+{using-an-extra-voice-for-breaks.ly}
+
@seealso
Notation Reference:
@ref{paper variables for line breaking}
Internals Reference:
@rinternals{LineBreakEvent}.
+@knownissues
+
+Placing @code{\autoLineBreaksOff} or @code{\autoBreaksOff} before
+any music will cause error messages to appear. Always place these
+commands after some music.
+
@node Page breaking
@subsection Page breaking
@node Manual page breaking
@unnumberedsubsubsec Manual page breaking
+@funindex \pageBreak
+@funindex \noPageBreak
+@funindex \autoPageBreaksOn
+@funindex \autoPageBreaksOff
+@cindex page breaking, manual
+
The default page breaking may be overridden by inserting
@code{\pageBreak} or @code{\noPageBreak} commands. These commands
are analogous to @code{\break} and @code{\noBreak}. They should
be inserted at a bar line. These commands force and forbid a
-page-break from happening. Of course, the @code{\pageBreak}
-command also forces a line break.
+page-break from happening at that bar line. Of course, the
+@code{\pageBreak} command also forces a line break.
The @code{\pageBreak} and @code{\noPageBreak} commands may also be
inserted at top-level, between scores and top-level markups.
+Within a score, automatic page breaks are prevented within music
+lying between @code{\autoPageBreaksOff} and @code{\autoPageBreaksOn}
+commands. Manual page breaks are unaffected by these commands.
+
There are also analogous settings to @code{ragged-right} and
@code{ragged-last} which have the same effect on vertical spacing.
If @code{ragged-bottom} is set to @code{#t} the systems will not
@predefined
-@funindex \pageBreak
@code{\pageBreak},
-@funindex \noPageBreak
-@code{\noPageBreak}.
+@code{\noPageBreak},
+@code{\autoPageBreaksOn},
+@code{\autoPageBreaksOff}.
@endpredefined
@seealso
Snippets:
@rlsr{Spacing}.
+@knownissues
+
+The @code{\once} prefix is ineffective with @code{\autoPageBreaksOn}
+and @code{\autoPageBreaksOff}. If auto page breaking is off and is
+then turned on to permit a page break, it must remain on for a few
+bars (the precise number of bars depends on the score) before being
+turned off, else the opportunity to break the page will not be taken.
@node Optimal page breaking
@unnumberedsubsubsec Optimal page breaking
more, they will interfere with each other.
-@node Explicit breaks
-@subsection Explicit breaks
-
-There are cases when manual @code{\break} or @code{\pageBreak}
-commands are ignored by LilyPond. There are two commands to
-override this behavior:
-
-@example
-\override NonMusicalPaperColumn.line-break-permission = ##f
-\override NonMusicalPaperColumn.page-break-permission = ##f
-@end example
-
-If @code{line-break-permission} is set to @code{##f}, all line
-breaks must be explicitly inserted with a @code{\break} command.
-Likewise, if @code{page-break-permission} is set to @code{##f},
-all page breaks must be explicitly inserted with a
-@code{\pageBreak} command.
-
-@lilypond[quote,verbatim]
-\paper {
- indent = #0
- ragged-right = ##t
- ragged-bottom = ##t
-}
-
-music = \relative c'' { c8 c c c }
-
-\score {
- \new Staff {
- \repeat unfold 2 { \music } \break
- \repeat unfold 4 { \music } \break
- \repeat unfold 6 { \music } \break
- \repeat unfold 8 { \music } \pageBreak
- \repeat unfold 8 { \music } \break
- \repeat unfold 6 { \music } \break
- \repeat unfold 4 { \music } \break
- \repeat unfold 2 { \music }
- }
- \layout {
- \context {
- \Score
- \override NonMusicalPaperColumn.line-break-permission = ##f
- \override NonMusicalPaperColumn.page-break-permission = ##f
- }
- }
-}
-@end lilypond
-
-@snippets
-
-@lilypondfile[verbatim,quote,ragged-right,texidoc,doctitle]
-{using-an-extra-voice-for-breaks.ly}
-
@seealso
Notation Reference:
@ref{Vertical spacing}.
This score isolates line- and page-breaking information in a dedicated
voice. This technique of creating a breaks voice will help keep layout
separate from music entry as our example becomes more complicated.
-See @ref{Explicit breaks}.
+See @ref{Breaks}.
Explicit @code{\breaks} evenly divide the music into six measures per
line. Vertical spacing results from LilyPond's defaults. To set
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