need help setting up a skew on a Fanuc

So our wire EDM operator got fired and I got put in the hot seat. I have very limited EDM experience and am learning bit by bit as the jobs roll in.

I've been indicating all my parts in to this point. However, I know that there is a way to set up a skew. I just haven't figured out how to make this machine do it. Does anybody out there run a Fanuc EDM with a Fanuc Series 18i-W controller?

Thanks-
Rick