(spacing-increment ,number? "Add this much space for a doubled
duration. Typically, the width of a note head. See also
@rinternals{spacing-spanner-interface}.")
+ (spacing-pair ,pair? "A pair of alignment symbols which set an object's
+spacing relative to its left and right @code{BreakAlignment}s.
+
+For example, a @code{MultiMeasureRest} will ignore prefatory items at its
+bounds (i.e., clefs, key signatures and time signatures) using the following
+override:
+
+@example
+\\override MultiMeasureRest #'spacing-pair = #'(staff-bar . staff-bar)
+@end example")
(springs-and-rods ,boolean? "Dummy variable for triggering
spacing routines.")
(stacking-dir ,ly:dir? "Stack objects in which direction?")