DBS3 USER GUIDE : Buttons
Button settings allow you to customize which buttons are displayed on your main screen, and the order that they appear.
To configure Button settings, go to Settings -> Buttons
Select an entry from the "Available Buttons" list and add it to the "Selected Buttons" list.
Use the "Move Up" or "Move Down" buttons to reorder your buttons as needed.
Click Save and your will see your selected buttons appear on the top of your screen in the order they were listed.