Scroll stitch is also known as single knotted line stitch. Scroll stitch creates a knotted line which follows the curve of a design well.
Work scroll stitch from left to right along the line. Bring your needle out of the fabric on the left, move along the line slightly and insert your needle on the line in a diagonal position pointing left making a small stitch. With the thread wrapped behind and under the needle pull your needle through the fabric. Do not pull the loop too tightly. Repeat this along the line.