7. Zoom Operation
Use two fingers to gently touch the desired item on the touch screen, and while keep touching the screen, slide to change the distance between your two fingers. By increasing (or decreasing) the distance, you can perform a zoom in (or zoom out) operation. For example, you can enlarge or reduce the picture size in Windows Photo Viewer.
8. Rotation Operation
Use two fingers to lightly touch the desired item on the touch screen, then rotate in the desired direction. For example, you can rotate the picture which is being displayed in Windows Photo Viewer.