<li>\subpage changing_orientation_of_elements_page "Change orientation"
of the selected elements.</li>
<li>\subpage cutting_quadrangles_page "Cut a quadrangle" into two triangles.</li>
+<li>\subpage split_to_tetra_page "Split" volumic elements into tetrahedra.</li>
<li>\subpage smoothing_page "Smooth" elements, reducung distortions in
them by adjusting the locations of element corners.</li>
<li>Create an \subpage extrusion_page "extrusion" along a vector.</li>
