How to Make a Buttonhole
Wrap the yarn around the needle as seen. Insert into the point A and while moving to the point B, Pass the yarn under the tip. Repeat the steps immediately next to the point A. It is applied around the part where it will be opened buttonhole, on the edges of the blankets, and for embroideries intending to prevent dropiing stitches.
Bring the yarn on the right side the knit. Move from the point B immediately next to the same point to the point B. Wrap the yarn inside the eye of the needle as many as you want and pull the yarn through the wraps. Knot the resulting bud pulling the yarn on the knit downward and create the bud. Move to the wrong side of the knit from the bottom of the bud with a needle and get 1 bud.