\version "2.11.57"

\header {
  texidoc = "Straight flag styles."
}


% test notes, which will be shown in different style:
testnotes = { \autoBeamOff c'8 d'16 c'32 d'64 \acciaccatura {c'8} d'64 c''8 d''16 c''32 d''64 \acciaccatura {c''8} d''64  }

{
  \override Score.RehearsalMark #'self-alignment-X = #LEFT
  \time 2/4
  R2 \break
  
  \mark "normal"
  \testnotes
%   \break

  \mark "modern straight"
  \override Stem #'flag = #modern-straight-flag
  \testnotes
  \break

  \mark "old straight (large angles)"
  \override Stem #'flag = #old-straight-flag
  \testnotes
%   \break
  
  \mark "custom slant"
  \override Stem #'flag = #(straight-flag 0.35 0.8 -5 0.5 60 2.0)
  \testnotes
  

}