Night Shift allows you to change the background colours of your display, which may help you to get a better nights sleep. Using your iPhones clock and location this function determines your local sunset and changes the colours to the warmer end of the visual spectrum. To enable this feature:
- Got to Settings
- Select Night Shift
- Schedule activation time
- Manually Enable Until Tomorrow
- Colour Temperature (remember that setting it too warm may affect the appearance of your display).