How do you apply the green screen effect to a video clip in Premiere?

[Ace Bizurk]

I saw they say use Ultra Key but what after that? How do I change it from chromakey green to another background?

[Meg The Dog]

Change the key color:

MtD

[R Neil Haugen]

You select the color to key on. With any color, you need to sample the color within the effect.

Neil