It is customary when transcribing mensural music into modern notation to place an indication of how the initial rests and note or notes of the original version appeared – including the original clefs. This is called an incipit. The \incipit command uses the indent of the main staff to set the width occupied by the incipit, and incipit-width to set the width of the incipit staff.

\score {
  \new Staff <<
    \new Voice = Tenor {
      \set Staff.instrumentName = "Tenor"
      \override Staff.InstrumentName.self-alignment-X = #RIGHT
      \incipit { \clef "mensural-c4" \key f \major r\breve r1 c'1 }
      \clef "treble_8"
      \key f \major
      R1 r2 c'2 |
      a4. c'8
    \new Lyrics \lyricsto Tenor { Cyn -- thia your }
    indent = 5\cm
    incipit-width = 3\cm

[image of music]

Known issues and warnings

Note that instrumentName must be set in the music for the incipit to be produced. If no instrument name is required then use \set Staff.instrumentName = "".

LilyPond — Notation Reference v2.25.8 (development-branch).