Marker pen, marker pen and whiteboard pen can sign on the mouse pad because the ink of marker pen is oily, and the surface material of mouse pad is usually rough, which makes the ink of marker pen leave obvious marks on the mouse pad.

Mouse pad refers to a small pad under the mouse, mainly to prevent the surface reflection and refraction of special materials such as glass from affecting the positioning of the mouse photoreceptor, and to provide a convenient plane for the mouse photoreceptor system to calculate the motion vector and facilitate people's work.