Lowering the sensitivity of preset java entity model animations

When I load a Java entity model, it tells me which group(bone) to apply which animation to. After setting it there, I want to know how to lower the sensitivity of the movement. For example, in the case of head animation, when the actual head angle is 90 degrees, it looks like it is bent about 45 degrees on the model. Also for other animations. If anyone knows how to do this, I would appreciate it if you could help me a little. If not, I hope Mcreator will have this feature in the future.