On older iPhones, Reachability can be used by tapping the Home button twice.
Tip: here’s a much more fun way to invoke Reachability on iPhone X
Guide
How to use flashlight and alert light on your Apple Watch
Turn on the flashlight and alert light on your Apple Watch so you can see things in the dark without hurting your night vision or safely take an evening run on the road.
How to disable Face ID or Touch ID discreetly on iPhone or iPad
Find out how to disable Face ID or Touch ID on your iPhone or iPad in case someone tries to force you to unlock your device against your will.
How to turn off Tap to Wake and prevent your iPhone screen from waking up with a touch
Learn how to turn off the Tap to Wake feature to prevent the screen on your iPhone or iPad from waking when touched, saving the battery.
2 ways to get to iPhone X’s app switcher faster
Apple instructs iPhone X owners to swipe up from the bottom edge of the display and pause in order to bring up the iOS app switcher. But there are faster, undocumented methods of opening the iPhone X app switcher which don't require performing this clunky gestural action.
How to buy apps with iPhone X using Face ID
Among other things, Face ID lets you authenticate any purchases made in iTunes Store, App Store or iBooks Store, which permits you to buy apps and media with a simple glance.
No Home button? No problem! Here are 10 tips and tricks for your iPhone X
iPhone X offers a whole new way of interacting with your phone.
How to hide iPhone X’s notch on the Lock and Home screen with Notch Remover
Can't stand that notch at the very top of the iPhone X display? I don't mind it at all. In fact, I find the notch to be a rather cute design element. Understandably, some folks may deem it visually distracting. If you'd like to conceal the notch, there's now an app for that, too!
How to use Reachability on iPhone for easy one-handed use
Learn how to use Reachability on your iPhone to easily reach the top of your screen when using your device with one hand.
2 ways to switch between apps on iPhone with Face ID
You can enter the iOS app switcher at any time while using one app in order to easily switch to another one. Thankfully, iPhones with Face ID (without a front physical Home button) include a gesture allowing you to quickly switch between open apps without having to enter the app switcher at all.
3 essential things to do before selling your Mac
Follow these tips before handing over your Mac to a new owner or sending it to Apple for trade-in to ensure your personal data is erased and Activation Lock is removed.
How to use Control Center on iPhone X
Because it lacks a Home button, Apple's iPhone X requires users to perform an upward swipe from the bottom edge of the display to get to their Home screen.