[Kelly Griffin] "Is there a way to do just a partial wipe transition, such as a page roll or blinds effect?"
Sure, insert a transition like Page Roll, then
right-click in the transition area and select
Insert/Remove Envelope | Transition Progress. An envelope will be added to the transition to which you can add new nodes and make it stop or reverse or do anything you want like reverse back to the beginning giving you a partial page reveal and then close again.
~jr
http://www.johnrofrano.com
http://www.vasst.com 
