capYOff                                       (Assignable)

        Contains a numeric value that indicates the offset where the caption
        is displayed.  This instance variable represents the number of pixels
        in the y direction (vertically) from the top edge of the button where
        the caption will be displayed.  If this instance variable is not
        supplied, the caption will be centered vertically.  This instance
        variable only affects applications running in graphic mode and is
        ignored in text mode.