Qtopia/Volume Applet
 
Adjust Volume
 - Enable Screen Sounds
     from the Sound Settings application. 
- Tap the Volume Applet
     from the taskbar. A slider and a checkbox will be popped up. 
- Jump the slider down in
     increments by tapping underneath the slider bar. The volume of each tap
     will become more quiet. 
- Jump the slider up in
     increments by tapping above the slider bar. The volume of each tap will
     become louder. 
Mute
 - Ensure Screen Sounds
     are enabled from the Sound Settings application. 
- Tap the Volume Applet
     from the taskbar. 
- Check the Mute
     checkbox. 
- Tap anywhere on the
     display. No sound will be emitted.