length, which is more, less or equal (within a given <b>Tolerance</b>) to the predefined
<b>Threshold Value</b>. See also a
\ref length_2d_page "Length 2D quality control".
+</li><li>
+<b>Coplanar faces</b> selects mesh faces neighboring the one defined by
+<b>Threshold Value</b> and whose normal has an angle less then an
+angular tolerance (defined in degrees) with normal of the face
+selected as threshold. Selection continues among neighboring faces of already
+selected ones.<br>
</li>
</ul>
