How do you use anti-aliasing?

Hi, how do you use anti-aliasing, and what is anti-aliasing?

I spread it on my thighs every morning for amazing performance.

Sorry ok. Antialiasing is when your graphics processor removes the jagged edges of polygon brushes by creating a midtone pixel in between... because your screen is made of little squares. Think of it as a sort of smart blur!

You can set it as high as you like/your pc can handle. It makes 3d models easier to the eye.

More on the subject here:

http://en.wikipedia.org/wiki/Anti-aliasing