Hi Ming, when you have the \change Staff already (as adviced in another mail on the list), what you need here is \showStaffSwitch:
For example: \version "2.18.2" << \new Staff = up { \showStaffSwitch a1 \change Staff = "down" c''1 } \new Staff = down { \voiceTwo c'1 c'1 } >> HTH Joram _______________________________________________ lilypond-user mailing list lilypond-user@gnu.org https://lists.gnu.org/mailman/listinfo/lilypond-user