keyframing a 3D rotation on an image

Hi Motion Community,

I have an image of a simple table (see below - picture 1)

And I've tilted it backwards like this (see below - picture 2)

I tilted by clicking this 3D button and pulling the top of the image down (see below - picture 3)

So far so good. However, I'd like to animate the motion from picture 1 to picture 2. I cannot for the life of me find a keyframe button for the button in picture 3.

Any suggestions on how to animate from picture 1 to picture 2?

Thank you so much.