Cutting method of sawtooth pattern: first, cut a straight line or arc according to the pattern, then hold the paper in your left hand and cut it with your right hand. The cutting tip is located above the index finger of the left hand. Cut a small triangle on the right side of the line or arc as the starting point of the sawtooth, and cut it from right to left. When cutting, the cutting tip should not leave the index finger, and the index finger moves left and right with the action of the scissors.
The size of the sawtooth is related to the left-right movement of the left hand, which requires long-term practice to achieve the same length and uniform size. For the same work, the sawtooth pattern should not change too much, otherwise there will be a sense of clutter.