Press the [VIEW MODE] button to cycle through displays as shown below.
[EYE SENSOR]: Automatic display selection using eye sensor
[EVF ONLY]: Viewfinder only
[LCD ONLY]: LCD monitor only
[EVF ONLY] + : Viewfinder only; eye sensor turns display on or off
The Eye Sensor
The eye sensor turns the viewfinder on when you put your eye to the viewfinder and turns it off when you take your eye away (note that the eye sensor may respond to objects other than your eye or to light shining directly on the sensor). If automatic display selection is enabled, the LCD monitor will turn on when the viewfinder turns off.