Reachability helps you to use iPhone in one hand by bringing down the content to bottom. It is there from iPhone 6 onwards, this feature enables the one hand use in the larger size displays. Usually, when you use iPhone X, 6, 6S, 7, 8 and 6 Plus, 6S Plus, 7Plus, 8 plus on your hand it is too huge, your finger will not reach the top content. So you have to use your other hand to access the top content, that’s why apple enabled reachability in iPhone. Initially, apple not enabled reachability feature in iPhone X. But Now you can Enable Reachability in iPhone X after the update of iOS 11.2.
iPhone which has the home button you can double tap the home button to get the Reachability option. But when comes to iPhone X there is no Home button. In iPhone X, you have to swipe down from the bottom of the iPhone X to get the reachability feature. iPhone X has the 5.8-inch display and its difficult access the top content, here the reachability helps you to use top content by bringing down. To Enable Reachability in iPhone X you have to go to accessibility option in the iPhone X. This feature is enabled in iOS 11.2 onwards, if you running with older versions, then you have to update to latest iOS to Enable Reachability in iPhone X.
How to Enable Reachability in iPhone X
To enable reachability in iPhone X, make sure that your iPhone X running iOS 11.2 or later, if not update to the latest IOS.
Go to setting
Tap on the accessibility
Scroll down And select Reachability and turn on
Now swipe down from the very bottom iPhone X to bring down the top content