The first thing most people want to do to customize their iPad is to change the background, lockscreen, or wallpaper.
Luckily, it isn’t hard!
The first thing you’ll need to do is find an image that is 1024×1024 (width x height). You can probably find a lot more images sized as 1024×768 (since that’s a traditional screen size), and then you can rotate it 90 degrees. I found many images that rotated well, but it will depend on what you want in your image. You can also find an image that is at least 1024 high, and then crop the sides using just about any image editing program.
Once you have your image, transfer it to your iPad by putting it in your Photos (using iTunes). You can also try mailing it to yourself and saving it to your camera roll.
Once the image is in your photos, you can select the image and make it your wallpaper. You can also set it using the Settings app, and choosing wallpaper, and then selecting the image. You can choose if you want it for your “lock screen” and/or you wallpaper. That’s it!