You can easily switch the volume. Just tap the button. It is useful when you want to turn down the volume for a while. The button is displayed over other apps. You can drag the button to anywhere on the screen. It is useful when: · the sound of the CM is noisy while watching videos and so on. · you want to make sound small while having a conversation. Usage: · Check "Show Volume Button" checkbox and "Quick Volume Changer" button is displayed in the center of the screen. · When using Android 6