If you own an iPhone 16 or an iPhone 17, you’ll find different buttons around the sides of your smartphone. The power / wake / side buttonThe button that most of us think of as the power button or the wake button (to lock or light up the screen) is actually officially called the side button, if you ask Apple. There’s lots more you can do with the volume buttons, in combination with the power button. Tap the volume up button and the power button together to take a screenshot, which can then be saved to your photo gallery. Quickly press and release the volume up button, then quickly press and release the volume down button, then press and hold the power button until the Apple logo appears.