A multifunction device generates a display of a first view of an application-centric library associated with an application. The application-centric library has content rules that limit files to those that include content compatible with the application. The first view includes a representation of a first file compatible with the application and added to the application-centric library. The instructions also include: while displaying the first view, detecting first inputs; in response to detecting the first inputs, generating a display of a second view comprising a representation of a second file not added to the application-centric library; while displaying the second view, detecting second inputs interpreted as a selection of the representation of the second file; and in response to detecting the second inputs, in accordance with a determination that the second file is compatible with the application, adding the second file to the application-centric library.