Select to turn the backlight on and off.

Hold to turn the device on and off or enable night vision mode.

Select to start or stop an activity.

Select to choose an option in a menu.

Select to return to the previous page.

Select to record a lap or a rest during an activity.

Select to scroll through widgets, menus, and messages.

Hold to view the clock from any page.

Select to scroll through widgets, menus, and messages.

Select to dismiss a short message or a notification.

Hold to view the main menu.