1, first open your own computer, and then open any browser on your computer. Take Baidu browser as an example.

2. After opening, on the mouse, find the position of the arrow on the right side of the mouse. If you want to draw a line on the screen, you must press the button on the right.

3, press the right mouse button, you can draw a line on the screen, you can operate according to your own requirements, the drawn line will appear on the screen, showing invalid actions. When you put down the right mouse button, it will disappear.