The Galaxy S4 allows you to open multiple applications at the same time, for example you can listen to music while reading your mail or sending instant messages.
However, open applications (running in the background) consume resources and your phone battery. To close these apps:
- Press the Home key for a few seconds.
- The list of the recently opened applications is displayed.
- Tap on the Task Manager.
- Tap on the Finish button next to the application you want to close.