1\version "2.17.6"
2
3\header {
4  texidoc = "The default callback for break-align-anchor in clefs and time/@/key
5signatures reads the @code{break-align-anchor-aligment} property to align
6the anchor to the extent of the break-aligned grob."
7}
8
9{
10  \override Score.RehearsalMark.break-align-symbols = #'(key-signature)
11  c1
12  \key cis \major
13  \once \override Staff.KeySignature.break-align-anchor-alignment = #LEFT
14  \mark \default
15  cis1
16  \key ces \major
17  \once \override Staff.KeySignature.break-align-anchor-alignment = #RIGHT
18  \mark \default
19  ces1
20}
21