The little red dot is TrackPoint, the unique pointing stick in Thinkpad. It is an excellent pointing device that is as convenient as the mouse or even more convenient than the mouse.
Gently push the pointing stick with your fingertips, and the ceramic plate at the bottom will bend slightly. The four bending sensors installed on the ceramic plate will immediately sense the direction and magnitude of the force.
It can quickly sense even small forces exerted on the pointing stick and operate precisely according to its intensity and duration.
If you apply a slight force, the pointer will only move a few units. Keep pushing and the pointer will speed up and move smoothly. If more force is applied momentarily, the pointer will move quickly to the target.
Extended information:
Advantages of the Thinkpad’s little red dot
1. It is located in the center of the keyboard, which ensures that the hands can be operated conveniently without leaving the keyboard. .
2. Since your fingers do not need to move during operation, the position is fixed and easy to click when clicking the button.
3. Your fingers do not need to leave the body during operation, and operations that require large movements of the pointer and drag and drop operations become extremely simple.
4. Just touching it lightly will not cause the pointer to move, so there will be no misoperation.
Baidu Encyclopedia-Little Red Riding Hood (Think Pad Little Red Dot)