Abstract: Variety of approaches to provide a copy of a notebook document are described. A copy application programming interface (API) of a productivity service initiates operations to copy a source notebook document upon receiving a request to copy a designated portion of the source notebook document to a destination. In response to the received request, the copy API retrieves serialized data stored in a source section file associated with the designated portion of the source notebook document. The serialized data is provided such that a new portion of a destination notebook document is constructed at the destination based at least in part on the serialized data.

Abstract: The present disclosure relates to an interface display method, the method comprising: generating a first screen interface and a second screen interface, wherein the first screen interface displays a functional interface associated with an application, and the second screen interface displays a navigation interface comprising functional modules associated with the application; displaying the first screen interface; displaying the second screen interface when the second screen interface is triggered; and displaying an interface associated with a functional module in the first screen interface when the functional module is selected from the second screen interface. This interface display method accomplishes convenient switching between functional modules without occupying screen display space. The present disclosure also provides an interface display device.