Upfront

I'm trying to load an image on top of a video and larger image using Upfront. I was able to load the image, but the image immediately settles at the top of the larger image. I found the centering and lowering tabs, but it does not lower the image enough. I would like to put the image directly in the center of the larger image.

Is there way to do this in Upfront?

Also, are there any good Upfront tutorials online?

Thanks,