Color keying a green-screen shot with Ultra Key

Keying effects use various methods to make portions of a clip transparent. To get a quick overview, choose Video Effects > Keying in the Effects panel. You’ll see many effects. With the exception of Alpha Adjust (the clip-based Opacity video effect), they fall into three basic categories:

• Color/chroma: Blue Screen (Windows only), Chroma (Windows only), Color, Non-Red, RGB Difference (Windows only), and Ultra Key

• Luminance: Luma, Multiply (Windows only), and Screen (Windows only)

• Matte: Difference, Garbage, Image, Remove, and Track