Use Back Tap for extra iPhone controls
You can set your iPhone to do different things when you double or triple tap the back of your phone. For example, you could set it to open the Control Center, take a screenshot, or switch to the last app you were using. To do this, go to Settings > Accessibility > Touch > Back Tap.
Turn your iPhone's camera into a document scanner
To scan a document with your iPhone, open the Notes app and tap the + button. Then, select Scan Documents. Hold your iPhone over the document and the camera will automatically detect the edges. Tap Scan to save the document.
Enable Face ID when wearing a mask
If you wear a mask, you can still use Face ID to unlock your iPhone. To do this, go to Settings > Face ID & Passcode and turn on "Use Face ID with a Mask."
Cast Harry Potter spells using Siri
If you're a Harry Potter fan, you can cast spells using Siri. Just say something like "Hey Siri, Lumos" to turn on your flashlight, or "Hey Siri, Wingardium Leviosa" to make an object float.
Hide sensitive or unwanted apps using the App library
The App library is a hidden folder where you can store apps that you don't want to see on your home screen. To access the App library, swipe left on your home screen.
Access the iPhone's hidden trackpad
You can use your iPhone's keyboard as a trackpad to move the cursor around the screen. To do this, triple-tap the spacebar.
Use Live Text to copy text from images
Live Text is a feature that lets you copy text from images. To use it, open an image and tap the Live Text button in the bottom-left corner. Then, you can select the text you want to copy and paste it into another app.
Take a screenshot of a specific part of the screen
You can take a screenshot of a specific part of the screen by using the Markup tool. To do this, press and hold the power button and the volume down button at the same time. Then, tap the Markup button and select the area you want to screenshot.