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601Final Cut Pro User Guide
When you play the clip, the Sample Color and Edges settings smoothly change from one
sample point to the next. For even greater control, you can add keyframes for most of the
other settings in the Keyer section of the Video inspector. For more information about
working with keyframes, see
Intro to video keyframing in Final Cut Pro.
Note: Keyframes for the chroma and luma graphs in the Color Selection controls appear
only in the Video inspector and not the Video Animation editor in the timeline.
Use luma keys in Final Cut Pro
Luma keys provide a way to composite a foreground clip over a background clip based on
the luma levels in the video. This is most often useful for still images, such as a picture of a
logo over a black background, or computer-generated graphics.
In the following examples, the speedometer image below is keyed over an outdoor car
scene, creating a reflected look.
Apply the luma key effect
1. In the Final Cut Pro timeline, move the playhead to the point in the background clip (the
clip you want to superimpose the luma key clip over) where you want the key to start.
2. In the browser, select the part of the foreground clip (the luma key clip) that you want to
key over the background, then choose Edit > Connect to Primary Storyline (or press Q).
For details about connecting clips in this way, see Connect clips in Final Cut Pro.