In iOS, it's easy to change wallpapers quickly.
Select "Choose a New Wallpaper"
Scroll to and select the Vellum Album
Choose the wallpaper face you'd like
Zoom/Move the wallpaper to where you'd like.
Choose either "Still" or "Perspective"
Select which background you'd like the image for.
We suggest using blurred/less contrasted images for the Home Screen.