--- /dev/null
+/*!
+
+\page skew_page Skew
+
+\n \b Skew mesh quality criterion reflects the angle between the lines
+that join opposite sides of a quadrangle element or the greatesr angle
+between three medians in triangle elements. This mesh quality
+criterion can be applied to elements composed of 4 and 3 nodes
+(quadrangles and triangles).
+
+\image html image27.jpg
+
+<em>To apply the Skew quality criterion to your mesh:</em>
+<ol>
+<li>Display your mesh in the viewer.</li>
+
+<li>Choose <b>Controls > Skew</b> or click <em>"Skew"</em> button of the toolbar.
+
+\image html image40.gif
+<center><em>"Skew" button </em></center>
+
+Your mesh will be displayed in the viewer with its elements colored
+according to the applied mesh quality control criterion:
+
+\image html image93.jpg
+</li>
+</ol>
+
+<br><b>See Also</b> a sample TUI Script of a
+\ref tui_skew "Skew quality control" operation.
+
+*/
