The completely new design in iOS 7 left some users feeling a bit lost, and as time went by, Apple began to bring back some of the old UI components that had previously made navigation more intuitive, although most were left as optional items buried in the Accessibility settings.
One example of this is “Button Shapes,” an enhancement (or regression, depending on how you look at it), designed to make the buttons that appear in the upper corners of most apps more obvious by bringing back the colored background shapes to things like “back” buttons. While some may feel it looks out of place in iOS’ new design, if you miss the obvious buttons from iOS 6 and prior, you can turn this feature on by going into Settings, General, Accessibility and toggling “Button Shapes” on. The effect will be immediate, with “back” buttons showing an arrow shape, and other buttons getting a shaded box around them to make them more readily apparent.
