The Preview view of the Control Area allows you to preview video, audio and graphics.

Video/Audio

Select the Video or Audio file you want to preview to show it in the Preview view. A yellow line at the left/right side indicates a trimmed in- or outpoint.
Use the mouse or the keyboard to control the Preview.
The Timeline shows the Play/Pause button, the elapsed time, the timeline with the CTI, the remaining time and the audio on/off button.

Graphics

Select the Graphics file you want to preview to show it in the Preview view.
Use the mouse or the keyboard to control the Preview.
In case there are stop frames in a composition, the preview will stop at each stop frame like it would do On Air. Press the Play button to release the stop frame.
The Timeline shows the Play/Release Stopframe button, the elapsed time, the timeline with the CTI, the stop frames (if available) and the remaining time.

Elapsed and remaining time are paused while staying at a stop frame

The Events posterframe will be shown in the Preview window while an Event is selected.