(with @code{+} sign).")
(augmented-slash ,boolean? "This figure is for an augmented figured bass
(back-slashed number).")
+ (automatically-numbered ,boolean? "Should a footnote be automatically
+numbered?")
(autosplit-end ,boolean? "Duration of event was truncated by automatic
splitting in @code{Completion_heads_engraver}.")
Options are @code{'text} and @code{'hairpin}.")
(span-text ,markup? "The displayed text for dynamic text spanners
(e.g., cresc.)")
+ (spanner-id ,string? "Identifier to distinguish concurrent spanners.")
(split-list ,list? "Splitting moments for part combiner.")
(start-callback ,procedure? "Function to compute the negative length
of starting grace notes. This property can only be defined as initializer