Running stitch is an arbitrary form of needling. It does not consider the direction, nor does it show the effect of narrow needles and needles. It can only see lines, but the width is only the width of the lines used. A stitch on a suit or shirt is a single needle. Any pattern design will not use only one stitch unless it is the effect you want. Running stitch can be used for shadow, background or other effects. Because all running stitch are painted in a coherent sketch, if the computer does not set the length of a single needle, in the picture, a small mark is used to indicate its step length. The use of running stitch is very effective on light weight fabrics or embroidered with rough threads on heavier fabrics. It can design light and smooth patterns.