* **1D**: if all mesh nodes lie on OX coordinate axis.
* **2D**: if all mesh nodes lie in XOY coordinate plane.
+* :ref:`Save cell/node numbers to MED file <med_export_numbers_pref>` preference controls whether node and cell numbers are saved.
+
**See Also** a sample TUI Script of an :ref:`Export Mesh <tui_export_mesh>` operation.