The present invention relates to a method for displaying a graphical interface having display areas including a reference area, wherein each file of a file set is displayed in the form of an icon in one of the display areas, and each file of the file set contains a unique identifier identifying the file, and processing a command for inserting into the file set a selected pre-existing file which does not belong to the file set, the processing of the insertion command including the steps of: generating a new file in the file set, from the content of the selected pre-existing file, generating a unique identifier identifying the new file, and inserting into the new file the generated unique identifier and a reference link generated from a file identifier corresponding to each icon located in the reference area.