Thank you, I'll keep this method in mind. I also discovered another way as well. On the next instance of them speaking, if you go to the preset facial expressions (the ones that say, Happy, Calm, Wink, etc), if you double click Neutral, it actually creates a copy and pasteable keyframe type of thing. Not sure what it is, but it's definitely a physical "thing" representing the neutral expression, which can be reused anywhere in the timeline.
Kind of weird that these workarounds are even needed for what seems to me to be very obvious, and needed functions. Does the new iClone fix this?
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My iClone short films: https://www.youtube.com/iClone316