On the home screen, tap an app icon to open it. To open one of the apps running in the background, swipe up the home key home_key_pie then swipe right and select the app.
Close an app
Swipe up the home key home_key_pie and swipe up the app you want to close.
Find your apps
Swipe up the home key home_key_pie and swipe up again to see all your apps.
Close all running apps
Swipe up the home key home_key_pie, swipe right through all apps, and tap CLEAR ALL.