+In contrast to the absolute positioning available through
+@code{Y-offset} and @code{X-offset}, relative positioning is possible
+with the @code{extra-offset} property of
+@code{line-break-system-details}. Placement is relative to the
+default layout or to the absolute positioning created by setting
+@code{X-offset} and @code{Y-offset}. The property @code{extra-offset}
+accepts a @code{pair} consisting of displacements along the X-axis and
+Y-axis.
+
+@lilypond[verbatim,quote,staffsize=16]
+\header { tagline = ##f }
+\paper { left-margin = 0\mm }
+\book {
+ \score {
+ <<
+ \new Staff <<
+ \new Voice {
+ s1*5 \break
+ \overrideProperty Score.NonMusicalPaperColumn.line-break-system-details
+ #'((extra-offset . (0 . 10)))
+ s1*5 \break
+ \overrideProperty Score.NonMusicalPaperColumn.line-break-system-details
+ #'((extra-offset . (0 . 10)))
+ s1*5 \break
+ }
+ \new Voice { \repeat unfold 15 { c'4 c' c' c' } }
+ >>
+ \new Staff {
+ \repeat unfold 15 { d'4 d' d' d' }
+ }
+ >>
+ }
+}
+@end lilypond
+