볼륨조절 상단바 (가장쉽게 볼륨조절)

■ Easiest volume control
- Ringtone, media, alarm, voice call, notification, system, etc. can be adjusted at once.

■ Automatic application of volume environment
- You can set the volume in advance according to the environment you are in, such as the library, my house, the office, and apply it easily.

■ Always adjust the volume
- You can adjust the volume at any time by lowering the top bar.