lbj273, you might want to take a look at the Space User Manual, which is available in the Support section of Eventide's site…

http://eventide.com/AudioDivision/Support/Stompboxes/Space.aspx

Har's correct that Space is set up differently than the other Factors. It's 3 switches are Select, Up, and Down. Rabiddiabetic13's correct, too, that you can use AuxSwitches to go Up or Down on any of the Factors. As Wedelich suggests, there is a lot more that you can do with AuxSwitches attached to the Space or any other Factor. That's all detailed in the User Manual.