Viewports Separated?

[mental]

Hello. When I opened up SFM I accidently clicked the "x" and my viewports were gone. I clicked the viewports button and all it did was open up the Viewports in a different window! How do I get it all in one like this video: http://www.youtube.com/watch?v=XRSZE8Rqaw8

[raptornx01]

go to windows, then layout

[mental]

♥♥♥♥♥♥♥♥♥♥♥.