This is what the adjustable limiter strap is for......Now "suspension adjustments" is a very broad term...Asking him how to put more pressure on the skis would have been a more specific question... You can "adjust" the suspension in many ways..... And i'am sure they have the Pro-Ride suspension dialed in from the factory and have the proper ski pressure already.
The suspension is much more sensitive to weight than the other suspension designs which is why it works so well when adjusted properly. To adjust it properly you have to read the owners manual, adjust it to their specs to get a baseline, and make small adjustments from there.