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diff --git a/doc/salome/gui/SMESH/input/adding_quadratic_elements.doc b/doc/salome/gui/SMESH/input/adding_quadratic_elements.doc
index 921948630..6a9527b5d 100644
--- a/doc/salome/gui/SMESH/input/adding_quadratic_elements.doc
+++ b/doc/salome/gui/SMESH/input/adding_quadratic_elements.doc
@@ -4,10 +4,28 @@
 
 \n MESH module allows you to work with <b>Quadratic Elements</b>.
 
-Quadratic Edge is not a straight but a broken line and can be defined
-by three points: first, middle and last. All more complex \b Quadratic
-\b Elements differ from ordinary ones in that they consist of Quadratic
-Edges.
+Quadratic elements are defined by the same corner nodes as the
+corresponding linear ones, but in addition they have \a midside nodes
+located between the corner nodes on element sides.
+
+If a quadratic 2D element has an additional node at the
+element center, it is a bi-quadratic element (both TRIA7 and
+QUAD9 elements are supported). If a quadratic hexahedral element has 7
+additional nodes: at the element center and at the center of each
+side, it is a tri-quadratic element (or HEXA27).
+
+The convention of nodal connectivity of elements used in SALOME is
+the MED library convention. You can consult the description of nodal
+connectivity of elements in the documentation on MED library or 
+<a href="http://www.code-aster.org/outils/med/html/connectivites.html">
+  here </a>.
+
+There are several ways to create quadratic elements in your mesh:
+- manually (this way is described below);
+- use \ref quadratic_mesh_anchor "Quadratic Mesh" hypothesis to
+generate a quadratic mesh on your geometry;
+- convert an existing linear mesh to a quadratic one 
+(see \ref convert_to_from_quadratic_mesh_page).
 
 <em>To add a quadratic element to your mesh:</em>
 <ol>
@@ -38,20 +56,22 @@ a new quadratic element is not created.
 
 
 To create any <b>Quadratic Element</b> specify the nodes which will form your
-triangle by selecting them in the 3D viewer with pressed Shift
+element by selecting them in the 3D viewer with pressed Shift
 button. Their numbers will appear in the dialog box as <b>Corner Nodes</b>
 (alternatively you can just input numbers in this field without
-selection).The edges formed by the corner nodes will appear in the
-table. To define the middle nodes for each edge double-click on the
-respective field and input the number of the node. All edges and the
-object formed by them will be displayed in the Object browser. When
-all edges are defined you will be able to click \b Apply or <b>Apply and Close</b> button to
+selection). The edges formed by the corner nodes will appear in the
+table. To define the middle nodes for each edge, double-click on the
+respective field and input the number of the node (or pick the node in
+the viewer). For bi-quadratic and tri-quadratic elements, your also
+need to specify central nodes.
+As soon as all needed nodes are specified, a preview of a new
+quadratic element will be displayed in the 3D viewer. Then
+you will be able to click \b Apply or <b>Apply and Close</b> button to
 add the element to the mesh.
 
 \image html aqt.png
 
-\b Reverse button for Quadratic Edges switches the first and the last
-nodes. For all other elements it reverses the element.
+\b Reverse button reverses the element.
 </li>
 </ol>