Most people store their digital photos in their Pictures folder or library.
Tap on it then you will be able to move and scale the selected photo and then set it as wallpaper for iPhone Lock screen, Home screen, or both.
If you don't see Set Desktop Picture in the shortcut menu, you should see a submenu named Services instead.
You will find a share button on the bottom left corner.
If you're , this changes the wallpaper of your primary display only.
We have more than 5000 different themes, among which you will definitely find what you were looking for! Under Background there is a drop-down list.