4 Theads can be traced automagically when they switch staffs by setting
5 property @code{followVoice}.
8 % followThread: connect note heads with line when thread switches staff
12 \property PianoStaff.followVoice = ##t
13 \context Staff \context Voice {
18 \context Staff=two {\clef bass; \skip 1*2;}
22 \paper { linewidth = -1.; }
25 \notes\relative c \fragment