5. Rolling Movement
When you move your finger one time vertically (or horizontally) on the touch screen, this is called a Rolling Operation. This operation is similar to moving the scroll wheel on the top of a mouse, and produces the same results as the scroll wheel interface does.
6. Zoom Operation
Touch two fingers lightly on the desired item on the touch screen, then keeping both fingers on the screen, change the distance between them. By increasing (or decreasing) the distance, you can perform a zoom out (or zoom in) operation. For example: you can enlarge or reduce the picture size in Windows Photo Viewer.
20User Guide
