How to change the theme of Apple 7 and the wallpaper of iphone7?

1. Turn on the phone and open the wallpaper theme item at the same time. 2. Then find the wallpaper and brightness options on the Apple phone. 3. After finding it, you can choose wallpaper or change the theme. It should be noted that you can choose from your own photo albums or take photos by yourself, or download them online. 5. After confirming the selection, click "Settings", and then click "Settings Home Screen" to return to the desktop to complete the settings. ?