Change it up a little! With Android Nougat preview 2, you can now set two different background photos for your home screen and lock screen. For example, you can now have a picture of your cat on your home screen. One of your dog on your lock screen. Go to Settings > Display > Wallpaper, pick your new wallpaper, tap Set wallpaper as you usually would, and select where you’d like to use that image.
Even quicker Quick Settings