5 In some cases, you may want to set slur attachments by hand.
11 \property Voice.Stem \set #'direction = #1
12 \property Voice.Slur \set #'direction = #1
14 \property Voice.Slur \set #'attachment = #'(stem . stem)
18 \paper { linewidth = -1. }
21 \notes\relative c \fragment