--- /dev/null
+\header {
+
+ texidoc = "The vertical positions of ledger lines may be customised
+by setting the @code{ledger-positions} property of the StaffSymbol.
+The given pattern is repeated. Bracketed groups are always shown together:
+either all or none are shown. Ledger lines can be set to appear sooner or
+later by setting the @code{ledger-extra} property."
+}
+
+\version "2.16.0"
+
+\new Staff \relative c' {
+ \override Staff.StaffSymbol #'line-positions = #'(-5 -2 -1 2 5 6)
+ \override Staff.StaffSymbol #'ledger-positions = #'(-5 (-2 -1) 2)
+ \override Staff.StaffSymbol #'ledger-extra = #1
+ g,4 c e b' c'' e g
+}