Newbie Navigation Question. Spinning the scene.

Is there an easy way to spin the scene 180?
I am loving Unreal. The blueprint section is brilliant, programming is logical and well thought out, everything is almost perfect - if I could just get the viewport to spin - like the lid of a jar. I can get the platform to spin 180, but then the light and the camera and everything else is in the wrong spot. I have reviewed the viewport control page, but I must be missing something.

Please, what key strokes make the scene spin around 180 so I can go from looking at the back to looking at the front.
Thank you.

You can set bookmarks, one at the front and one at the back.