It's a little hard to describe without knowing which stitch regulator it is- I have a Grace stitch regulator, and it can be a touch tricky.
Which stitch regulator do you have? Did it come with instructions? If it is a Grace, they are AMAZING at walking you through the set-up. Best customer service ever, and much more efficient than one of us trying to tell you, IMO.
You need to set it up! It's the most fun ever. I don't have pantos, just do all free motion and I love it!