Pour changer de portée :
\change Staff = "lower"
\change Staff = "upper" 
Liens utiles
Texte dans la partition
^\markup { \italic rallent. }
_\markup { \italic rallent. }
Petites notes
\acciaccatura { g16 f }
Exemples
Tremolo
 \repeat tremolo 8 { <gis eis>16 cis } 
Doubles liaisons
  \set doubleSlurs = ##t
  \set doubleSlurs = ##t
Changement d’instrument
    \set Staff.midiInstrument = #"piccolo"
Commentaire
% {page suivante}
Trilles
\startTrillSpan
Triolet
\tuplet 3/2 { f8 g a }
  Invisible
    \override TupletBracket.bracket-visibility = ##f
  \omit TupletNumber
Segno
\bar "||" \mark \markup { \musicglyph #"scripts.segno" }
Point d’orgue
\fermata
Silence initial
\compressFullBarRests
R2*4 ou R4.*6 etc 
Paroles en italiques
\override LyricText #'font-shape = #'italic 
Changement de tempo
\set Score.tempoHideNote = ##t
    \tempo 4 = 108
Nuances invisible pour decrescendo non fermé
a4 -\tweak stencil ##f mf 
<nowiki/>

<score vorbis="1" raw>
\version "2.18.2"

\header {
  title = "QUATRE ROMANCES"
  subtitle="a) En Arles"
  composer = "Musique de MAURICE JAUBERT"
  poet="Poèmes de P. J. TOULET"
  % Supprimer le pied de page par défaut
  tagline = ##f
}

\layout {
  \context {
    \Score
    \remove "Bar_number_engraver"
  }
}

global = {
  \key g \major
  \numericTimeSignature
  \time 6/4
  \mergeDifferentlyHeadedOn
  \mergeDifferentlyDottedOn
  \tempo "Grave" 4=80
}

melody = \relative c'' {
  \global
  \autoBeamOff
  \set Staff.midiInstrument = #"piccolo"



}


verse = \lyricmode {


}

rightOne = \relative c'' {
  \global
  \stemUp


}

rightTwo = \relative c' {
  \global
  \stemDown



}

dyna = \new Dynamics {


}

left = \relative c' {
  \global


}

leadSheetPart = \new Staff \with {
  instrumentName = "CHANT"
} { \melody }
\addlyrics { \verse }

pianoPart = \new PianoStaff \with {
  instrumentName = "PIANO"
} <<
  \new Staff = "right" \with {
    midiInstrument = "acoustic grand"
  } << \rightOne \rightTwo >>
  \dyna
  \new Staff = "left" \with {
    midiInstrument = "acoustic grand"
  } { \clef bass \left }
>>

\score {
  <<
    \leadSheetPart
    \pianoPart
  >>
  \layout {
    \context {
      \Staff \RemoveEmptyStaves
      \override VerticalAxisGroup #'remove-first = ##t
    }
  }

  \midi {
    \context {
      \Score
      tempoWholesPerMinute = #(ly:make-moment 100 4)
    }
  }
}
</score>