11. This is used in making fancy stitches. 12. It applies downward pressure on the material as it is fed under the needle. 13. It is used to decide the kind of stitch to be sewn on the fabric, such as straight stitches or zigzag or an embroidery stitch. 14. It is used to wind the bobbin thread on the empty bobbin. 15. This is used in making buttonholes on garments.