- (X-extent-callback ,procedure? "Procedure that calculates the
-extent of this object. If this value is set to @code{#f}, the object
-is empty in the X direction. The procedure takes a grob and axis
-argument, and returns a number-pair.
-")
-
- (X-offset-callbacks ,list? "A list of functions determining this
-objects' position relative to its parent. The last one in the list is
-called first. The functions take a grob and axis argument. ")
-
- (Y-extent-callback ,procedure? "see @code{X-extent-callback}.")
- (Y-offset-callbacks ,list? "see @code{X-offset-callbacks}.")
-
+ (X-offset ,number? "The horizontal amount that this object is moved relative to its X-parent")
+ (Y-offset ,number? "The vertical amount that this object is moved
+relative to its Y-parent")