It’s easy to adjust display the brightness and color temperature on your iPhone, iPad, or iPod touch. Here’s how:
- On an iPhone X or later, or an iPad with iOS 12 or iPadOS, swipe down from the top-right corner of your display. On an iPhone 8 or earlier, or on an iPod touch, swipe up from the bottom edge of your display.
- Drag the brightness bar up or down to adjust the brightness.
(This how-to is based on my experiences and info on Apple’s support pages — where the images sometimes come from.)