\version "2.12.0"

\header {
  texidoc="
Fret diagrams can be presented in landscape mode.

"
}

\layout { ragged-right = ##t }

<<
  \chords {
    c1 |
    c1 |
    c1 |
    c1
  }

  \new Voice {
    \textLengthOn
    \override TextScript #'fret-diagram-details
       #'orientation = #'landscape

     %% C major for guitar, regular style
    c'1 ^\markup {
            \fret-diagram #"6-x;5-3-3;4-2-2;3-o;2-1;1-o;"}

     %% C major for guitar with barre on fret 3, regular style
    \once \override TextScript #'fret-diagram-details 
        #'label-dir = #LEFT
    \once \override TextScript #'fret-diagram-details 
        #'barre-type = #'straight
    c' ^\markup {
            \fret-diagram 
               #"f:1;s:1.2;6-x;c:5-1-3;5-3-1;4-5-2;3-5-3;2-5-4;1-3-1;"}

     %% C major for guitar with two barres, regular style

    c' ^\markup {
            \fret-diagram 
              #"f:2;h:5;6-x;c:5-1-3;5-3-1;c:4-2-5;4-5-4;3-5-4;2-5-4;1-3-1;"}
   
     %% C major for guitar, with capo 
    c' ^\markup {
            \fret-diagram-verbose #'((mute 6)
                                     (capo 3)
                                     (place-fret 4 5 1)
                                     (place-fret 3 5 2)
                                     (place-fret 2 5 3))}

 }
>>