This function is used to manage graphic object viewing in space.
Having built, or read from an archive, a graphic data base (CSS), simply activate this icon to view the graphic objects which must in principle be referenced to a view index (pset_view_index). If this is not the case, an index is automatically inserted. This index is used to calculate a default view.
To move in space 3 possibilities :
- View simple widget
- View expert widget
- popup - menu in workstation
