\version "2.12.3"

voltaI = \markup { \text \fontsize #2 \sans "1.+2." }
voltaII = \markup { \text \fontsize #2 \sans "letzt" }

\score {
    <<
    \new ChordNames \chordmode { es1. c2:sus4 r1 es f g }
    \new Staff
    \relative c'' {
        \key g \major
        \time 4/4
        
        \set Score.repeatCommands = #(list(list 'volta voltaI) 'end-repeat)
        g8 a g g~ g2~ | g r |
        \set Score.repeatCommands = #'((volta #f))
        \once \override Staff.BarLine #'transparent = ##t
        \bar "|."
        s4
        \once \override Staff.BarLine #'extra-offset = #'(-8 . 0)
        \bar "||"
        \once \override Staff.KeyCancellation #'extra-offset = #'(-8 . 0)
        \once \override Staff.KeySignature #'extra-offset = #'(-8 . 0)
        \key f \major
        \stopStaff
        \once \override TextScript #'extra-offset = #'(-10 . 3)
        s2.^\markup { \musicglyph #"scripts.segno" }
        \set Score.repeatCommands = #(list(list 'volta voltaII))
            
        \startStaff
        \set Staff.printKeyCancellation = ##f
        \key g \major
        \override Staff.Clef #'full-size-change = ##t
        \clef treble
        \bar ""
        g8 a g g~ g2~ | g1~ | g^\fermata |
        \set Score.repeatCommands = #'((volta #f))
        \bar "|."
    }
    >>
}