# Skew

Skew mesh quality criterion reflects the angle between the lines that join opposite sides of the element. SKEW is a maximum value of all skew angles. This mesh quality criterion can be applied to elements composed of 4 and 3 nodes (quadrangles and triangles)

To apply the Skew quality criterion to your mesh:

1. Display your mesh in the viewer.

2. Choose Controls > Skew or click button of the toolbar. Your mesh will be displayed in the viewer with its elements colored according to the applied mesh quality control criterion:

See Also a sample TUI Script of a Skew quality control operation.