Examples:
Brackets for the repeat are normally only printed over the topmost
-staff. This can be adjusted by setting the @code{voltaOnThisStaff}
-property; see
+staff. This can be adjusted by moving @code{Volta_engraver} to the
+Staff context where you want the brackets to appear;
+see @ref{Modifying context plug-ins} and
@lsr{repeats,volta@/-multi@/-staff@/.ly}.