Side that first page appears on. Value is @racket["left"] or @racket["right"]. A blank page will be inserted if necessary. Default is @racket["right"].
Side that first page appears on. Value is @racket["left"], @racket["right"], or @racket["next"]. Default is @racket["right"]. If the value is @racket["left"] or @racket["right"], a blank page will be inserted if necessary.