5 Markings that are attached to (invisible) barlines are
6 delicate: the are attached to the rest of the score without the score
7 knowing it. Consequently, they fall over often.
12 onestaff = \context Staff = foo\notes\relative c'' {
13 \property Staff.instr = instr
14 \property Staff.instrument = instrument \mark "B"
15 c1 \mark "A" \break c2 c2 \break
18 grstaff = \notes \relative c'' \context GrandStaff <
19 \context Staff = bar {
21 \property Staff.instr = instr
23 \mark "B" \break c1 \mark "A" c2 }
24 \context Staff = bufl { c1 c2 }