Nuevo iPhone 5S: How to Use iOS 11's One-Handed Keyboard

How to Use iOS 11's One-Handed Keyboard
Tom's Guide
That includes every iPhone 6 and 7 as well as the new iPhone 8 and 8 Plus. It will also work on the iPhone X when that 5.8-inch device ships. You won't find the feature on the iPhone SE and iPhone 5s, even though those 4-inch devices can run iOS 11.