If you don’t like how the buttons look on your iOS 7 or later iPhone, you can just change them. All you have to do is launch the Settings app and then tap on General. From that point, tap on Accessibility and then tap on the On/Off toggle option that is located next to Button Shapes so it’s turned on. After this option is turned on, you will notice that the button shapes or labels have an underline that makes them easier to read.