Chroma Keying and Working with Green Screens > Refining Your Key >

# Animating Your Key

The following parameters of a key can be animated:

- The average colour selected using the Average Colour pot in the Keyer menu
- The minimum and maximum Tolerance and Softness values
- The Lift, Gain, Shrink, and Erode values
- The blur factors for the matte and key-in clip
- The Maximum and Minimum Input and Output level values for the histogram

To display the Animation controls in the Keyers, click Animation to the left of the keyer menus. Using the Channel Editor, animate the parameters.

#### Related Information

- Chroma Keying and Working with Green Screens