Button functionsThe ROX GPS 11.0 has four buttons:Top right: The top right button turns the ROX GPS 11.0 on and off. When the ROX GPS 11.0 is on, the top right button is now the "Enter" or "Start" button. Press the "Enter" to confirm selections within menus.Top left: The top left button is the "Stop" button when a training session is in progress. Within menus, the top left button is the "Back" button.Two bottom buttons: The ‘+’ and ‘-’ buttons increase or decrease values, navigate through menu items, or toggle between screens while training. To access the short menu while training, press and hold the bottom right button. Press both bottom button at the same time to activate the backlight.