\version "2.7.39"
\header {texidoc = "@cindex Slur, dotted, dashed
The appearance of slurs may be changed from solid to dotted or dashed.
"
} 
\layout{ ragged-right=##t }


\relative c'{
  c( d e  c) |
  \slurDotted
  c( d e  c) |
  \slurDashed
  c( d e  c) |
  \override Slur #'dash-period = #2.0
  \override Slur #'dash-fraction = #0.4
  c( d e  c) |
  \slurSolid
  c( d e  c) |
}