There are three ways to enable Night Shift on your device (iOS 11 and later):
- Swipe up on your Home screen to open Control Center. Perform a hard press on the brightness slider. Select the Night Shift option.
- Navigate to Settings > Display & Brightness > Night Shift then tap "Manually Enable Until Tomorrow."
- Navigate to Settings > Display & Brightness > Night Shift and select the "Scheduled" option to schedule a time for Night Shift to automatically enable itself.