How'd they do this? []

Hey all,

I’m trying to figure out how the good folks at set up the zoom and move for their site. When I try to do it, everything [eventually] ends up in the right spot, but it seems to “start” the scale at the middle and then after its completed the zoom, it moves the x and y values. I can’t seem to get them to do both at the same time.

Any ideas?

Thanks in advance!