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diff --git a/doc/salome/gui/SMESH/input/free_nodes.rst b/doc/salome/gui/SMESH/input/free_nodes.rst
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+.. _free_nodes_page:
+
+**********
+Free nodes
+**********
+
+This mesh quality control highlights the nodes which are not connected to any  mesh element. 
+
+.. image:: ../images/free_nodes.png
+	:align: center
+
+In this picture some nodes are not connected to any mesh element after deleting some elements and adding several isolated nodes.
+
+**See also:** A sample TUI Script of a :ref:`tui_free_nodes` operation.
+
+