Your Suunto EON Steel has three buttons that have different functions in different views. Short pressing or long pressing them gets you to different functionalities.
By default Suunto EON Steel has four main dive modes: Air/Nitrox, Trimix, CCR and Gauge.
Press and hold the middle button to enter Main menu and select the appropriate mode for your dive under Dive settings » Mode.
Suunto EON Steel automatically restarts to change mode.
Suunto EON Steel has two main views: time/no deco and compass. Change the main view by pressing the middle button.
More views are available through customization in DM5. See How to customize dive modes with DM5.
For more detailed information on the views available in the different modes, see Dive modes.
Suunto EON Steel automatically switches between surface and dive state. If you are more than 1.2 m (4 ft) below the water level and the water contact is on, the dive state is activated.
When tank pressure screen is in use, you see the following information:
The switch window in the bottom right corner has different information that can be changed by short pressing the lower button.