How do I move specific bones like the torso or head when an animation is playing?

Unity Engine
1

My human characters have a walk and run animation. At some point, I need to move the head to look up and down but they snap back when I lift up the controller buttons, so I have to keep the buttons pressed.

How can I fix this?

I am using transform.Rotate

Thanks in advance if you care to share a solution

2

You can use animation rigging to override animation or an avatar mask in the animator controller that will prevent those pieces of the character from being controlled by the animation

3

masks are way to go or you have to use a toggle to override in every frame after animation pass.