My screen is so magnified that I cannot switch the phone off or access any function
My screen has magnified itself and I cannot access any function or switch it off
iPhone 11, iOS 13
Turn off. Simultaneously press and hold the side button and either volume button until the sliders appear, then drag the top slider to power off. Or go to Settings > General > Shut Down. See Turn iPhone off and on.
Force restart. Press and release the volume up button, press and release the volume down button, then press and hold the side button until the Apple logo appears. See Force restart iPhone.