.. _skew_page: **** Skew **** **Skew** mesh quality criterion reflects the angle between the lines that join opposite sides of a quadrangle element or the greatest angle between a median and a midline in a triangle element. This mesh quality criterion can be applied to elements composed of 4 and 3 nodes (quadrangles and triangles). .. image:: ../images/image27.jpg :align: center *To apply the Skew quality criterion to your mesh:* .. |img| image:: ../images/image40.png #. Display your mesh in the viewer. #. Choose **Controls > Face Controls > Skew** or click *"Skew"* button |img| of the toolbar. Your mesh will be displayed in the viewer with its elements colored according to the applied mesh quality control criterion: .. image:: ../images/image93.jpg :align: center **See Also** a sample TUI Script of a :ref:`tui_skew` filter.