
On the iPad, iOS 11 and iOS 12 merge the Control Center with the App Switcher as part of an overhauled interface that's meant to put more of a focus on multitasking. The update also adds new ways to access the App Switcher and it brings new, enhanced app switching functionality.
Accessing the App Switcher
- On the Home screen, simply swipe up and hold to bring up the App Switcher.
- Within an app, swipe up to bring up the dock and continue the swipe further to access the App Switcher.
- Alternatively, the App Switcher can still be accessed by a double press on the Home button on iPads with a Home button.

When you open two apps at once using multitasking functionality, the app arrangements are preserved in the App Switcher, so you can quickly switch between multiple multitasking windows with a simple swipe and tap.

Closing Apps
There's normally no need to close apps on iOS because Apple manages the device's power needs and keeps apps from using resources when not in use, but if you need to close an app, here's how:
- Bring up the App Switcher.
- Swipe upwards on any app to close it.
Article Link: How to Use the iPad App Switcher