Doubt in animation module

[Gustavo MARC]

I'm studying Creature 2D and I have a question that I believe is even easy to solve, but despite researching a lot I haven't found a solution yet.
I'll explain it here:
My doubt and the animation part. In other animation software I can easily change the view of a face, for example over time. I'm not able to do this in Creature. I don't want the opacity to be decreasing. I want an image in a certain frame to simply disappear so that another one appears in its place.
I would be immensely happy if I have a return from you.
Grateful for the attention.

[chong]

Hello,

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Thanks