4.Redesigned App Switcher
iOS 11 combines the App Switcher and Control Center into one unified view so that you can get the best of both worlds from a single place. It also displays the dock at the bottom of the screen.
There are a couple of ways to open the new App Switcher:
- Press the Home button twice.
- Perform a swipe up gesture on the screen using four fingers.
- Swipe up from the bottom of the screen to the middle of the screen.