diff --git a/doc/salome/gui/SMESH/images/formula1.png b/doc/salome/gui/SMESH/images/formula1.png
index 2f8d2f518..b3468a15a 100644
Binary files a/doc/salome/gui/SMESH/images/formula1.png and b/doc/salome/gui/SMESH/images/formula1.png differ
diff --git a/doc/salome/gui/SMESH/images/formula2.png b/doc/salome/gui/SMESH/images/formula2.png
index ff189aa8e..dd45fbfb1 100644
Binary files a/doc/salome/gui/SMESH/images/formula2.png and b/doc/salome/gui/SMESH/images/formula2.png differ
diff --git a/doc/salome/gui/SMESH/input/aspect_ratio_3d.doc b/doc/salome/gui/SMESH/input/aspect_ratio_3d.doc
index 6e8b70808..2ea62f1f8 100644
--- a/doc/salome/gui/SMESH/input/aspect_ratio_3d.doc
+++ b/doc/salome/gui/SMESH/input/aspect_ratio_3d.doc
@@ -7,8 +7,8 @@ parameter as the \ref aspect_ratio_page "Aspect ratio" criterion, but
 it is applied to 3D mesh elements: tetrahedrons, pentahedrons,
 hexahedrons, etc.
 
-- The <b>Aspect Ratio</b> of a \b tetrahedron 3D element is calculated
-by the formula:
+- The <b>Aspect Ratio</b> of a \b tetrahedron 3D element defined by
+vertices {a,b,c,d } is calculated by the formula:
 
 \image html formula1.png