Facial expressions can be produced by two different data types:
Facial Expression Clips and Facial Expression Keys.
If you have already applied a facial expression clip to your character, Facial Expression Keys may override the expressions from the Facial Clip.
Refer to the Clip and Key Priority section.
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Record a facial expression clip for a character by using the Face Puppet Editor.
The facial expression keys will be automatically generated on the relevant tracks:
Head, Face and Eye.

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Double click on the time frame (with facial expression key) to add a special facial expression key by using the Face Key Editor.
The original expressions from the Facial Clip will be overridden by the subsequently added facial keys.
