Moff = { \set ignoreMelismata = ##t }
Mon  = { \set ignoreMelismata = ##f }
mel = \markup { \italic { Mel. } }
at  = \markup { \italic { a tempo } }
osv = \lyricmode {
  \override LyricText #'font-shape = #'italic
  osv.
  \revert LyricText #'font-shape
}

railroad = {
  \once\override Score.BreathingSign #'text =
  #(make-musicglyph-markup "scripts.caesura.curved")
%\override BreathingSign #'text = #(make-musicglyph-markup "scripts.caesura.straight")
  \breathe
}