First, we'll check the Altimeter setting to make sure the pressure you received from ATIS is the same as what is displayed here. You should notice that the setting is already very close, because EFIS/One “knows” what airport you are on and it “knows” what the field elevation is, so it will adjust the altimeter accordingly. If you’re off-airport, set it yourself so the AGL number is 0.

You can switch the ADI from standard (blue over brown) to Terrain (blue over simulated terrain) depending on your preference.  When flying over large bodies of water (shown as dark blue over light blue when in terrain mode) it might be best to switch it to standard mode.

The altitude bug setting will display a yellow crosshatched bar on the altimeter tape from 100' above to 100' below the altitude selected here.  This helps you maintain your assigned altitude, or lets you know when you've reached decision height.

EFIS/One can do a fantastic job of fuel management using a fuel flow sensor in your main fuel line that feeds the engine.  It can even monitor fuel sent back to a tank through a return line. Before you start your flight, you can click the “fuel onboard” button to take fuel readings from each tank.  You can alternatively enter an exact amount of on-board using the field provided.  You can only check the fuel level and have it entered into the fuel computer while on the ground (although you can see the fuel level shown on the fuel sensors while in flight).  Fuel burn and endurance will be displayed on the settings window at all times during flight.