Buttonhole foot thin fabrics call for finer threads and needles but what if you are making a buttonhole in a delicate blouse add cording to give strength without bulk hook fine filler cord around the spur on the back of the buttonholer and up through the forks before sewing the buttonhole the janome buttonhole foot r 830823004 can be used to create perfectly aligned buttonholes with a one step buttonhole machine sliding plate under foot has conveniently spaced markings to start and stop you