(threshold ,number-pair? "(@var{min} . @var{max}), where
@var{min} and @var{max} are dimensions in staff space.")
(tie-configuration ,list? "List of (@var{position} . @var{dir})
-pairs, indicating the desired tie configuration. A non-pair entry in
-the list will cause said tie to be formatted automatically. ")
+pairs, indicating the desired tie configuration where @var{position} is
+the offset from the center of the
+staff in staff space and @var{dir} indicates the direction of the tie
+(1=>up, -1=>down, 0=>center). A non-pair entry in the list will cause
+the corresponding tie to be formatted automatically.")
(transparent ,boolean? "This makes the grob invisible.")
(uniform-stretching ,boolean? "If set, items stretch proportional
to their durations. This looks better in complex polyphonic patterns")