Was just editing in Sony Vegas and this happened. The timeline has merged two layers into one, and the video preview is stuck on that two sided image thing. I'm not sure what I did to make it happen but I've never seen it before and now I can't find a way to turn it off. How do I get the timeline/video preview back to normal? Thanks.
From online Help (F1).
To exit expanded edit mode and return to the previous window layout; perform any of the following actions:
Choose Edit > Select > Exit Expanded Edit Mode.
Press 5 on the numeric keypad.
Double-click the event edge.