\version "2.15.10"
\paper { line-width = 9\cm tagline =##f}
\markup\wordwrap { Fingering direction is set to DOWN, but explicit 
  directions should override. The given directions here are: default, UP, DOWN, default
}
\score{
  \new Staff {
    \override Fingering #'direction = #DOWN
    c'4-3 c'4^3 c'4_3 c'4-3 |
  }
}