We're just going to look at making a yarn over before a row of knit stitches. This is a useful way of making a decorative increase up the edge. It produces an open lacy edge. My needle has six stitches on it currently and a normal knit stitch you enter the stitch with the yarn underneath the needle. If you want to have a yarn over before that stitch just tuck the needle under the yarn then into the stitch and as you make the stitch you have put a yarn over on the needle first. It often happens to begin in itters by accident and they don't understand when the extra stitches have come from. Let's do it one more time. Needle under the yarn, into the stitch and there's your yarn over. One extra stitch has been added. Let's just have a look at it using the left hand to operate the yarn. Needle under the yarn, into the stitch and knit.