This disclosure describes systems, methods, and computer program products for displaying one or more pages of a first document in a first region on a user interface; displaying thumbnail images of the one or more pages of the first document in a second region on the user interface; receiving user input for inserting one or more pages from a non-digitized second document into the first document; and in response to the user input, digitizing the one or more pages of the non-digitized second document using a document scanning device, and inserting the one or more pages of the digitized second document into the first document, wherein the inserted pages are displayed as part of the first document on the user interface.