What is the mark on the mouse pad?

Use balm or perfume. Apply wind oil or perfume to the handwriting of marker pen. After a while, Mark's handwriting will be easily erased.

A Marker pen (English: Marker Pen or Marker) is also a Marker pen. It is a drawing color pen for writing or painting, which contains ink itself and usually has a pen cover. Generally, there are soft and hard written heads and two heads, a small head and a big head. The pigment of marker pen is volatile and can be used for quick drawing at one time. It is often used to design articles, advertising slogans, posters or other artistic creations. You can draw thick lines with little change. Box-head pen is a kind of marker pen. Markers are also divided into water-based and oily inks. Water-based ink is similar to colored pen, and it contains no oil essence. Oily ink is more irritating and volatile because it contains oil essence. If the paint falls off the toy, you can use a marker to make up the color. Water-based marker is bright and transparent, but it will turn gray after repeated color superposition, which is easy to damage the paper. Also, if you use a pen dipped in water, the effect is very similar to watercolor, and some water-based markers will be waterproof after drying. Therefore, when buying a marker, you must understand the attributes of the marker and what it looks like. Markers can be bought in the design room. You can paint them by opening the lid, and all kinds of materials can be colored. There are many colors of marker pens, usually as many as hundreds. The distribution of colors is divided into several series according to common frequency, some of which are commonly used gray series with different color levels, which is very convenient to use. Generally speaking, according to different types of animation, interior, architecture, clothing, etc. , there are different color combinations. Color selection includes 24 colors, 30 colors, 36 colors, 40 colors, 60 colors, 80 colors, 168 colors, 202 colors and 262 colors. According to the increasing demand, the variety of colors has increased to thousands. Its nib generally has a variety of thicknesses, and lines with different thicknesses can be drawn according to the different angles of the nib. Markers have the characteristics of fast drawing speed, rich colors and strong expressive force, and are especially favored by architects and interior designers. We can create various styles of indoor performance diagrams by using the various characteristics of the tag. If you use a marker to draw on sulfuric acid paper, you can blend the colors before drying to produce the effect of watercolor painting. You can also use the translucent effect of sulfuric acid paper to render the back of the paper with a marker.