4Back Tap to Launch Functions Quickly:
There may be certain functions or system controls you use very frequently on your iPhone such as taking screenshots, adjusting the volume, opening the magnifier, scrolling, accessing the Control Center and more. iOS 14 has a new feature which lets you double tap or triple tap the back of the device to launch select functions.
Need to lock the screen without pressing the physical side key? Assign a double or triple tap gesture to it. You get the picture, right? Back tap is meant to create a simple and easy way to trigger certain device tasks for those with accessibility needs.
Since it only recognizes two types of tap gestures, you can only configure two tasks to go with each combination of taps – double and triple. That doesn’t make it any less useful.
You can enable the function by digging into the Settings > Accessibility > Touch > Back Tap. This pulls up Double Tap and Triple Tap options. Assign a function to each (or one) of these gestures by clicking on them and picking from the list of options.