1\version "2.19.21"
2
3\header {
4  texidoc = "System separators may be defined as markups in the
5@code{system-separator-markup} field of the paper block.  They are
6centered between the boundary staves of each system."
7}
8
9\paper {
10  system-separator-markup = \slashSeparator
11}
12
13foobar = \relative {
14  c'1 c \break
15  c1 c \break
16  c1 c
17}
18\book {
19  \score {
20    \new GrandStaff <<
21      \new Staff \foobar
22      \new Staff \foobar
23    >>
24  }
25}
26