With Magnifier, you can turn your iPhone or iPad into a magnifying glass so you can zoom in to different things. Magnifier uses your camera to enlarge objects or text so you can view them more easily.
Turn on Magnifier
On your iPhone or iPad, go to Settings > Accessibility.
Tap Magnifier, then turn it on. This adds Magnifier as an accessibility shortcut.
You can also add Magnifier to Control Center
Go to Settings > Control Center, then tap Customize Controls.
Tap the add button next to Magnifier.
Then from Control Center, tap the Magnifier button to use it.