33NOTE:• To sew the buttonholes 16 to 21, follow the sameprocedure as Square BH (See page 34 to 35).• The size of a buttonhole is automatically setby placing a button in the rear of the automaticbuttonhole foot R.• The button holder of the foot takes a button size ofup to 2.5 cm in diameter.• It is sometimes necessary to change buttonholesize to match certain heavy or specific materialsand threads.• Make a test buttonhole on an extra piece of thefabric to check your setting.• Place the button on the fabric and mark the top andbottom to determine the position of the buttonholeon the fabric.• Use an interfacing on stretch fabrics.Various Kinds of Buttonholes and Their Usesq Square ButtonholeThis square buttonhole is widely used on medium toheavy fabrics. The buttonhole size is automaticallydetermined by placing a button in the foot.w Round-end ButtonholeThis buttonhole is used on fine to medium weight fabrics,especially for blouses and children’s clothes.e Fine Fabric ButtonholeThis buttonhole is rounded at both ends and is used onfine, delicate fabrics such as fine silk.r Keyhole ButtonholeThe keyhole buttonhole is widely used on medium toheavy fabrics. It is also suitable for larger and thickerbuttons.t Stretch ButtonholeThis buttonhole is suitable for knit fabrics. It can also beused as a decorative buttonhole.y Antique ButtonholeResembles a “Hand Worked” buttonhole ideal on finefabrics featured in Heirloom sewing or for couturefashions.qwerty