\version "2.11.53"

#(ly:set-option 'point-and-click #f)
% test notes, which will be shown in different style:
testnotes = {
    \autoBeamOff
    \stemUp
    c'8 d'8 e'8 f'8
    c'16 d'16 e'16 f'16
    c'32 d'32 e'32 f'32
    c'64 d'64 e'64 f'64
    \acciaccatura {c'8 c'16 c'32 } f'16 |

    \stemDown
    c''8 d''8 e''8 f''8
    c''16 d''16 e''16 f''16
    c''32 d''32 e''32 f''32
    c''64 d''64 e''64 f''64
    \acciaccatura {\stemDown c''8 c''16 c''32 } b'16\bar"|."
}


{
  \override Stem #'flag-style = #'straight
  \testnotes

  \revert Stem #'flag-style
  \testnotes
  
  \override Stem #'flag-style = #'mensural
  \testnotes
}