diff --git a/doc/salome/gui/SMESH/input/double_elements_control.doc b/doc/salome/gui/SMESH/input/double_elements_control.doc
index 63ee0e762..e9d195296 100644
--- a/doc/salome/gui/SMESH/input/double_elements_control.doc
+++ b/doc/salome/gui/SMESH/input/double_elements_control.doc
@@ -9,6 +9,9 @@ These mesh quality controls highlight the mesh elements basing on the same set o
 In this picture some faces are coincident after copying all elements
 with translation with subsequent Merge of nodes.
 
+\note VTK viewer has the limitation that volume elements basing on
+the same set of nodes are invisible in the VTK viewer.
+
 \sa A sample TUI Script of a \ref filter_double_elements "Filters of Double Elements".
 
 */