diff --git a/doc/salome/gui/SMESH/images/duplicate01.png b/doc/salome/gui/SMESH/images/duplicate01.png
index b35c7785f..80a4a2ba9 100644
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diff --git a/doc/salome/gui/SMESH/images/duplicate02.png b/doc/salome/gui/SMESH/images/duplicate02.png
index 1b5cfabc5..0e5014125 100644
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diff --git a/doc/salome/gui/SMESH/input/double_nodes_page.doc b/doc/salome/gui/SMESH/input/double_nodes_page.doc
index 063bcba5e..1ac96910f 100644
--- a/doc/salome/gui/SMESH/input/double_nodes_page.doc
+++ b/doc/salome/gui/SMESH/input/double_nodes_page.doc
@@ -2,10 +2,10 @@
 
 \page double_nodes_page Duplicate Nodes
 
-\n This operation allows to duplicate nodes of your mesh.
+\n This operation allows to duplicate nodes of your mesh that is
+useful to emulate a crack in the model.
 Duplication consists in replacement of an existing mesh element by another one.
-Lower level elements of the duplicated ones are cloned
-automatically. 
+Lower level elements of the duplicated ones are cloned automatically. 
 
 <em>To duplicate nodes:</em>
 <ol>
@@ -61,10 +61,12 @@ Parameters to be defined in this mode:
 <li><b>Group of elements to replace nodes with new ones</b> (<em>mandatory</em>): the duplicated nodes
  will be associated with these elements.</li>
 <li><b>Construct group with newly created elements</b> option (<em>checked by default</em>): 
- if checked - the group with just created elements will be built.</li>
+ if checked - the group of just created elements will be built.</li>
+<li><b>Construct group with newly created nodes</b> option (<em>checked by default</em>): 
+ if checked - the group of just created nodes will be built.</li>
 </ul>
 
 
-<br><b>See Also</b> a sample TUI Script of a \ref tui_duplicate_nodes "Duplicate nodes" operation.  
+<br><b>See Also</b> a sample TUI Script of a \ref tui_duplicate_nodes "Duplicate nodes" operation.
 
 */
diff --git a/doc/salome/gui/SMESH/input/modifying_meshes.doc b/doc/salome/gui/SMESH/input/modifying_meshes.doc
index 6a8801f3e..024937f9b 100644
--- a/doc/salome/gui/SMESH/input/modifying_meshes.doc
+++ b/doc/salome/gui/SMESH/input/modifying_meshes.doc
@@ -22,7 +22,7 @@ the mesh or some of its elements.</li>
 elements.</li>
 <li>\subpage symmetry_page "Mirror" the mesh
 through a point or a vector of symmetry.</li>
-<li>\subpage double_nodes_page "Duplicate nodes".</li>
+<li>\subpage double_nodes_page "Duplicate nodes" to emulate a crack in the model.</li>
 <li>Unite meshes by \subpage sewing_meshes_page "sewing" free borders,
 conform free borders, border to side or side elements.</li>
 <li>\subpage merging_nodes_page "Merge Nodes", considered coincident