Note: This option is not available on iPhones with a 4-inch screen, such as the iPhone 5S or the 2016 iPhone SE.
This section explains the steps you need to follow in order to enable one-handed keyboard on iPhone iOS 12. This is a step-by-step guide with pictures of the screens to help you.
1. When you have the keyboard open, tap and hold on the Emoji icon . If you have more than one software keyboard installed on your iPhone, you may have a Globe icon instead. In that case, tap and hold on the Globe.
2. You should now see a pop-up menu with three keyboard icons. Tap the left keyboard to shrink the keyboard to the left and the right icon to shrink the keyboard to the right. Either way, you will now have a one-handed keyboard. To return to the full-sized keyboard, tap the middle icon.
3. You can also set the one-handed keyboard as the default option. Tap the Settings icon on your home screen, then tap General. Scroll down and tap Keyboard.
4. Tap One-Handed Keyboard.
5. Tap Left or Right to set the left or right one-handed keyboard as the default. Select Off to return to the normal, full-sized keyboard. When you're happy with your settings, tap the Back arrow to return to the keyboard settings. Alternatively, press the Home button or slide up from the bottom of the screen to return to the Home screen.