It's the Camera Angle Step function and it helps you get the same angle on a rendering every time. Or you can do a birds eye view of a plan. Have a client that just isn't getting the plan view? Render it from above to help them understand.
|Rendered from above|
|Rendered in elevation|
How to use it:
As always have fun. Let me know if you want to see something special here.
Hope you aren't snowed in. :)