Step 1: On your iPhone, go to the Settings option.
Step 2: Next window, navigate to Accessibility --> Scroll down and select Back Tap in the subsequent window.
Step 3: Here you'll find 2 options to choose from: Double Tap, Triple Tap. Each action will have different functions, tasks. As per the guide, Mytour.vn will choose: Double Tap --> Tick the Take Screenshot option.
Now, try lightly tapping twice on the back of your iPhone with your index finger to check if the screenshot has been taken.
With these settings, you can customize some tasks to operate iPhone functions more conveniently such as: Tap 2 or 3 times on the back to lock the screen, adjust volume, return to the main screen...
https://Mytour.vn/cach-go-mat-lung-iphone-chup-anh-man-hinh-tren-ios-14-27434n.aspx
How to tap the back of iPhone to take phone screenshots on iOS 14 is extremely useful and convenient, isn't it? Share this article with your friends so they can also know and use this cool feature. Wish you success in implementing the steps above.