Third- and fourth-generation models in Apple's iPod touch line of portable media players support custom wallpapers for the device's home screen as well as the lock screen. The two wallpapers do not need to be the same picture. You can set a picture saved on your iPod touch as the home screen or lock screen wallpaper from the iPod's settings menu.
Setting Wallpaper in the Photos Application
Tap the "Settings" icon on your iPod touch's home screen and tap "Wallpaper."
Tap the section of the screen that contains images of your current home and lock screens. The images are directly under the "Wallpaper" heading and are on a white background.
Tap the name of the photo album that contains the picture you want to set as your wallpaper. You can use photos in your camera roll, photos you have synchronized with iTunes, or images you have downloaded from the Internet using Safari.
Tap the picture you want to set as your wallpaper. Drag and pinch the picture until you size and center it to your preferences.
Place two fingers on your image. Pull the two fingers apart to zoom in on your picture or pinch them together to zoom out. Lift your fingers off the screen once your wallpaper is your desired size.
Tap your image with one finger and drag it until the section of the image you want to set as your wallpaper is shown on the screen.
Tap the "Set" button and tap "Set Lock Screen," "Set Home Screen" or "Both" to designate the correct screen for your wallpaper.
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