ComponentOne PdfViewer for Windows Phone is optimized for a touch environment and includes several touch interactions. These interaction are fairly intuitive, for example to move to view a different area of a document you can touch and drag your finger across the screen of the phone and the section of the document that is displayed will change according to the direction you move.
You can also double-tap the screen to zoom into a document. The document will zoom in one level of magnification. To zoom in more, you can double-tap to zoom in another level of magnification. Additional interactions will be added in the future to improve the PdfViewer for Windows Phonetouch environment.