A touchpad is a pointing device that is operated with a finger or thumb. This alternative screen allows the cursor to be moved on the display and enables click commands to be given. As an alternative to your regular or ergonomic mouse, using a touchpad on the left or right side can reduce one-sided strain. Research shows that using a separate touchpad provides more freedom of movement than an integrated touchpad on a laptop.
Additionally, using a touchpad allows you to work more within the shoulder line, which means less strain on your arm and shoulders. By placing the touchpad in the center, your shoulders can rest comfortably beside your body while you operate the touchpad with both hands. This way, you work with the touchpad mouse in a centered position, but you can also place the mouse to the left or right of your keyboard. This allows for more variation, which is always recommended for prolonged computer work.