The Shifting Screen
Modern iPhones are massive devices, often requiring two hands to comfortably reach the top corners. To combat this, Apple includes an accessibility feature called “Reachability.” By default, if you swipe down gently on the very bottom edge of the screen (the home bar), the entire user interface violently shifts downward, bringing the top of the screen to the middle of the display. While useful for people with small hands, it is incredibly easy to trigger by accident. If you are rapidly scrolling through a webpage or trying to hit the spacebar on the keyboard, a slight downward motion will cause the whole screen to collapse, interrupting your workflow. You must disable the gesture.
How to Turn Off Reachability
You can permanently sever the downward-swipe gesture via the Accessibility settings.
- Open the Settings app on your iPhone.
- Scroll down and tap on Accessibility.
- Under the “Physical and Motor” section, tap on Touch.
- Locate the toggle switch labeled Reachability (it should be the second option from the top).
- Toggle this switch to the Off position (the green background will disappear).
A Locked Interface
The change takes effect instantly. The iPhone will completely deactivate the background listener monitoring the home bar for downward swipes. You can now tap, scroll, and drag near the absolute bottom edge of your screen as aggressively as you want. The user interface will remain perfectly locked in place, guaranteeing that your screen will never again collapse unexpectedly while you are trying to type or navigate an app.