The invention relates to a system (10) for displaying at least one virtual object comprising a secondary screen (20) for displaying the virtual object, a primary screen (30), an optical means for overlaying images displayed on the secondary screen (20) with images displayed on the primary screen (30), and a pointing surface combined with the primary screen (30) for detecting the contact of one or more physical pointing elements. A device (90) for manipulating at least one virtual object comprises calculation means for generating images of the virtual object displayed on the system (10) from information output from the system (10) in accordance with the actions of the operator (100).