Abstract: A device for displaying a document includes a display screen, a human-machine interface, a first memory zone and at least one second memory zone separate from the first memory zone. The zones are configured to contain similar information. A processor is configured to execute a first process and at least one second process when a display request is received via the human-machine interface. Those processes include respectively reading first information in the first memory zone and second information in the second memory zone. That information corresponds to the display request. The processes also include respectively producing a first display layer and a second display layer associated with the display screen, the first display layer and the second display layer being displayed on the display screen superimposed.