Music types accepted: apply-output-event

Apply_output_engraver is part of the following context(s) in \layout: ChoirStaff, ChordGrid, ChordGridScore, ChordNames, CueVoice, DrumStaff, DrumVoice, Dynamics, FretBoards, GrandStaff, GregorianTranscriptionStaff, GregorianTranscriptionVoice, InternalGregorianStaff, InternalMensuralStaff, KievanStaff, KievanVoice, MensuralStaff, MensuralVoice, PetrucciStaff, PetrucciVoice, PianoStaff, RhythmicStaff, Score, Staff, StaffGroup, StandaloneRhythmScore, StandaloneRhythmStaff, StandaloneRhythmVoice, TabStaff, TabVoice, VaticanaScore, VaticanaStaff, VaticanaVoice, and Voice.