How do I zoom with motion ?

Hello,

I'd like to do some zooming with Motion that I can use on FCPX.

To do so, I followed this tutorial: https://www.youtube.com/watch?v=udTfoMD5qSs

The problem is that on the type of zoom we have these choices :

and I'd like to add others, such as a "bounce" effect

I know it's possible because the AddMotion plugin does it.

Would you know how to do it?

Thanks

[Edited by Moderator]