2. Down button 
1)Thumbnail file list: Move down to highlight different pictures
2)Zoom: It will move the picture downwards
3)Single show and slide show mode: Click the button to return to the Main Menu
3. Up button
1)Thumbnail file list: Move up to highlight different pictures
2)Zoom: It will move the picture upwards
3)Single show mode: Click the button to enter into slide show mode and click it again to choose the intervals.
8