-@lilypond[fragment,relative 1]
- \context ChordNames \chords { c:dim f:maj7 }
-@end lilypond
+@lilypond[fragment,relative=2]
+\chords { c:dim f:maj7 }
+@end lilypond
+
+@item @code{<<@{e f@} \\@{c d@}>>}
+@tab polyphony
+@tab
+@lilypond[fragment,relative=2]
+\context Staff <<{e f} \\ {c d}>>
+@end lilypond
+
+
+@item @code{s4 s8 s16}
+@tab spacer rests
+@tab