Keep Model/Asm Center While Saving

Using SW 2016 to make an animation and trying to save. I want to minimize the viewing size and want to use the 1:1 aspect ratio. However, when I change the ratio to any other setting the model moves and no longer center. I tried saving in different locations moving. How do I move or keep model/assembly centered to get nice centered  a video.

SolidworksMotion Studies