Pen holding posture: There are two pen holding postures, which vary from person to person, so choose the one that suits you better.

The working principle of pen spray is that when the thumb is pressed down, it means venting, and when it is pressed back, it means coloring. The more backboards there are, the more paint there is. When lifting a pen, you should pay attention to the big arm with the small arm, and the small arm with the wrist to form joint movement, so that the drawn lines are smoother and more natural, and it is easy to control the changes of the lines.