Change start objects position in Solidworks animation

Here is something I wasn't able to figure it out from the tutorial:

How can I change the objects position at the start point in a motion study? Assume I did a lot of work creating animations, than I discover I have to change the initial position of something...Is it create another motion study and do from zero all the animation again my only choice?

hope not  ..

thanks!

Marco Gigante

SolidworksMotion Studies