4 Theads can be traced automagically when they switch staves by setting
5 property @code{followVoice}.
10 % followVoice: connect note heads with line when thread switches staff
14 \property PianoStaff.followVoice = ##t
15 \property Voice.VoiceFollower \set #'type = #'dashed-line
16 \context Staff \context Voice {
21 \context Staff=two {\clef bass \skip 1*2}
25 \paper { linewidth = -1. }
28 \notes\relative c \fragment