1. Find "Display"
Press Menu.
Scroll to Settings and press OK.
Scroll to Display and press OK.
2. Select option
Select one of the following options:
Select background image, go to 2a.
Select theme, go to 2b.
Select background image, go to 2a.
Select theme, go to 2b.

3. 2a - Select background image
Scroll to Wallpaper and press OK.
Highlight the required background image and press OK.
4. 2b - Select theme
Scroll to Theme and press OK.
Highlight the required theme and press OK.
5. Exit
Press Disconnect to return to standby mode.