PiPO M9 pro OTA - Manual (Page 13)

１３
2.1 Change wallpaper:
Tap the ―Settings‖ icon on the all apps panel, you will see a pop-up options;
Enter into ―Display‖ interface, you can choose wallpaper from Gallery, live
Wallpapers or Wallpapers.
2.2 Add/delete applications on home screen:
There are several apps in the home screen, you can also add more
frequently-used app icons in this home page and delete some less
frequently-used ones.
Tap the app launcher in the top right corner to go to all apps panel, tap and
move the app you want to the home screen.