(control-points ,list? "List of offsets (number pairs) that form
control points for the tie, slur, or bracket shape. For B@'eziers,
this should list the control points of a third-order B@'ezier curve.")
+ (corner-radius ,number? "The diameter of a blot, in rounded
+boxes. If set to #0, the corners will we completely sharp; default is
+#1. If set to a too big value, it will be ignored and the shortest
+edges of the box will be drawn as semicircles."
(damping ,number? "Amount of beam slope damping.")
(dash-fraction ,number? "Size of the dashes, relative to