Change the volume of your music
1. In the Music app, tap a song, an album, or a playlist.
2. If the music player controls aren't visible on the screen, tap the screen.
3. When the music player controls are visible, tap the screen.
4. Slide your finger on the volume slider to turn up or turn down the music volume.
Tip: You can also change the volume quickly when you press the Volume Up or Volume Down keys on
the side of your BlackBerry device.