+<li>\subpage deflection_page "Deflection" - allows to change the
+deflection coefficient of a shape.</li>
+<li>\subpage material_page "Material" - allows to change the
+material properties of a shape.</li>
+<li>\subpage point_marker_page "Point Marker" - allows to change the
+representation of geometrical vertices.</li>
+<li>\subpage line_width_page "Line Width" - allows to change the
+width of edges and isolines.</li>