A user interface for a touch-screen display of a computing device is described. The user interface has an edge navigation feature designed to facilitate navigation through digital content items, such as electronic books, in response to user input received via the touch-screen display. This navigation may be to an arbitrary point within the content, or to previously defined bookmarks. The user interface provides a representation of a virtual edge of the content object, such as a book or album. Presentation of this virtual edge, overlaid with bookmark indicators, allows the user to spatially visualize the position of content within the book, and select a desired location or bookmark.