--- /dev/null
+.. _deflection_2d_page:
+
+*************
+Deflection 2D
+*************
+
+This quality control criterion consists of calculation of distance between a mesh face gravity corner
+and the surface the face discretizes.
+
+*To apply the Deflection 2D quality criterion to your mesh:*
+
+.. |img| image:: ../images/mesh_deflection.png
+
+#. Display your mesh in the viewer.
+#. Choose **Controls > Face Controls > Deflection 2D** or click *"Deflection 2D"* |img| button in the toolbar.
+
+
+Your mesh will be displayed in the viewer with faces colored according to the applied mesh quality control criterion:
+
+.. image:: ../images/deflection_2d.png
+ :align: center
+
+
+**See Also** a sample TUI Script of a :ref:`tui_deflection_2d` operation.