3 \header { texidoc = "If the 'whiteout property of a
4 grob is set to a number or #t, or if the 'whiteout-box
5 property is set to #t, that part of all objects
6 in lower layers which falls under the extent of
7 the grob's whiteout area is whited out. Here the
8 TimeSignature whites out the Tie but not the StaffSymbol.
14 \override Staff.StaffSymbol.layer = #4
15 \once \override Tie.layer = #2
17 \once \override Staff.TimeSignature.whiteout = #3
18 \once \override Staff.TimeSignature.layer = #3
25 \override Staff.StaffSymbol.layer = #4
26 \once \override Tie.layer = #2
28 \once \override Staff.TimeSignature.whiteout-box = ##t
29 \once \override Staff.TimeSignature.layer = #3