the Toolbar Panel : it contains buttons for manipulating 3D scenes, i.e. new, open,
save, and the mouse modes for interaction with the 3D scene. It contains also a button for
creating animations and the help button.
the Screen Panel : this is where you visualize the 3D scene.
the Message Panel : this is where the information are written (labels pointed by the
mouse on the 3D scene, loading information, description of the buttons, etc).
the Tab Panel : it is made up of 3 tabs that interact with the current 3D scene : the View
tab enables you change the camera position, and other globals parameters, the Edit
tab is for editing the loaded 3D models, and the Search and Load tab is
to load new 3D models.
