Edge motion
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Edge motion is a property of a notebook computer's touchpad which lets the user scroll the computer screen without having to move the pointer to a scrollbar.
Moving the finger along an edge of the touch pad acts as a scroll wheel, scrolling the window that has the focus vertically or horizontally depending on which edge is stroked.
When the scrolling operation is complete, the cursor returns to its original position. This saves the labor of (1) moving the cursor to the scrollbar and (2) moving it back to where it was.
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