The highlight pen is a good tool to improve the local brightness of the picture in the art creation. The fine art highlight pen of the pen has strong coverage, which is especially necessary when depicting water lines. Appropriate highlighting will make the water lines vivid and lifelike. In addition, the highlight pen is also suitable for glass, plastic, metal, wood, ceramics, etc. The construction principle of the highlight pen is similar to that of ordinary correction fluid, and the nib is a thin plastic or metal needle with built-in elasticity. Generally, there are three specifications of 0.7, 1.0, and 2.0, with three colors of gold, silver and white. When writing, press down slightly for smooth water flow. At present, there are many good brands of highlight pens on the market. The Japanese Sakura brand is the most popular, and the single price is generally about 12 to 15 yuan.