There are many different ways you can customize your Android device, and taking the time to do so can help create a much more personal, fun experience. What better place to start than by changing your wallpaper?
From your home screen, access your image gallery and find the image you want to use.
When selecting the image, tap the image and hold down for a second. A new icon should appear at the top right hand corner of the screen.
Click the new icon and a drop down menu will appear. Select 'Set As'.
You'll then have to option to set the image as a contact photo, home screen, lock screen or both home and lock screen.
After that you're taken to the edit screen which will allow you to position the image to fit your screen. If your image is already the proper size you won't have to worry about this.
Once you have it just the way you like, click 'Done' at the top right corner.