Add landscape rotation capability to 1 view in iPhone app

I need to add a landscape view when the iPhone is rotated to a single view in an existing app. The view currently displays a PDF file from the app bundle in a UIWebView and we'd like to support the ability for people to view it in landscape format if they rotate their phones. Just this one screen needs to support the rotation. You can view screenshots of the app at the following link to see the current view in action. [[login to view URL]][1]