The D7200 is a DSLR, or digital single lens reflex camera, which means that the image seen through the lens is reflected by a ‘reflex’ mirror in the body up into an optical viewfinder. This means you’re looking at the scene with all the clarity of the naked eye.
The viewfinder covers 100% of the area the sensor will capture, but it doesn’t show how the sensor will record colours, tones and effects. You won’t see this until you view the photo in playback mode. To see the digital image ‘live’, you need to press the live view button  on the back of the camera.
The viewfinder does, however, show exposure and status information in an LED strip directly below the image area, and the currently selected focus point is highlighted in red when you half-press the shutter release.