3.View the Dock from Anywhere
Switching between your favorite apps is now much easier in iOS 11 since it allows you to view the dock from anywhere. You no longer have to go back to the Home screen just to open a different app or use the App Switcher to do it.
Swipe up from the bottom of the screen to bring up the dock, then tap on any of your favorite apps to open it. It’s as simple as that.