To reduce the effect, you can turn on Reduce Motion in Settings > General > Accessibility. When you turn on Reduce Motion, Home screen transitions will fade instead of zoom.
When the parallax effect is on, you may notice the following:
- Wallpaper, icons, and alerts shift slightly as you move your phone.
- When you set a wallpaper in Settings > Wallpapers & Brightness, the photo or image will be slightly zoomed and can't be scaled to fit the screen.
If you zoom in, you will need to rescale your wallpaper to fit to the screen. You can't rescale certain photo formats, including landscape or square images.
To learn more about iOS 7, refer to the user manual.