The virtual back button can be moved to any part of the screen by pressing and holding on the button while dragging it to a different area.The virtual back button can only be disabled while using the main music playback interface. The button cannot be disabled while using music streaming applications. Android OS requires a back button to be present for Android apps to function properly.To disable the back button in the main player screen – drag the button to the middle of the screen and release it. The back button can also be turned off in the Settings Menu, Settings > Input Method > Back Button• [Disclaimer] This feature is only available on select Astell&Kern players.