Data at a point deliver the local values of a collection.
                    
Caution: Only data of the active (displayed) visualizer are accessible.
                Depending on the displayed collection, data at a point can be linked to a node or an
                element of the support associated to the collection. Data at a point can be edited
                via  menu or via a double click directly on the graphic representation.
                Data at a point deliver the following information:
                    - Data type (standard or resulting of a Fourier transformation)
- Application coordinates of the data
- Name and collection type of the data
- Current values and its components