❑Scroll: You can scroll by moving the pointing device while holding down the center button, without using the scroll bar.
❑Zoom: To drag the zoomed picture, move the pointing device while holding down the center button. To change the zoom percentage, click while holding down the center button. To change the zoom size,
❑Not used: Check when neither of the functions is used.
✍When you set the pointing device sensitivity to high, the pointer may move across the screen on its own. This is called a “drift” and is not a malfunction. The pointer stabilizes if you do not touch the pointing device for a few seconds.
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