Open Themes
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To modify wallpaper settings, select Wallpaper.
To change the background image of the home screen, select Image or Slide show.
To select the slide show images and set the time interval between the images, select Options > Slide show settings.
To save your settings, select Back.
To change the general theme or the theme for the Menu view or the home screen, or to modify the call image settings, scroll left or right.