diff --git a/doc/salome/gui/SMESH/images/addinfo_group.png b/doc/salome/gui/SMESH/images/addinfo_group.png
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diff --git a/doc/salome/gui/SMESH/images/addinfo_mesh.png b/doc/salome/gui/SMESH/images/addinfo_mesh.png
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diff --git a/doc/salome/gui/SMESH/images/addinfo_submesh.png b/doc/salome/gui/SMESH/images/addinfo_submesh.png
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diff --git a/doc/salome/gui/SMESH/input/mesh_infos.doc b/doc/salome/gui/SMESH/input/mesh_infos.doc
index 0d1cfbaf5..1a34bc48b 100644
--- a/doc/salome/gui/SMESH/input/mesh_infos.doc
+++ b/doc/salome/gui/SMESH/input/mesh_infos.doc
@@ -13,14 +13,16 @@ in the toolbar.
 \image html image49.png
 <center><em>"Mesh Information" button</em></center>
 
-The <b>Mesh Information</b> dialog box provides two tab pages:
-- <b>Base Info</b> - to show base information about selected mesh
+The <b>Mesh Information</b> dialog box provides three tab pages:
+- <b>\ref advanced_mesh_infos_anchor "Base Info"</b> - to show base information about selected mesh
 object
-- <b>Element Info</b> - to show detail information about selected mesh
+- <b>\ref mesh_element_info_anchor "Element Info"</b> - to show detail information about selected mesh
 node or element.
+- <b>\ref mesh_addition_info_anchor "Additional Info"</b> - to show additional information available
+for selected mesh, sub-mesh or group object.
 
 \anchor advanced_mesh_infos_anchor
-<h2>Base Info</h2>
+<h2>Base Information</h2>
 
 The <b>Base Info</b> tab page of the dialog box provides general
 information on the selected object - mesh, sub-mesh or mesh group:
@@ -47,6 +49,54 @@ The use can either input the ID of a node or element he wants to
 analyze directly in the dialog box or select the node or element in
 the 3D viewer.
 
+\anchor mesh_addition_info_anchor
+<h2>Additional Information</h2> 
+
+The <b>Additional Info</b> tab page of the dialog box provides an
+additional information on the selected object: mesh, sub-mesh or
+group.
+
+For mesh object, the following information is shown:
+- Name
+- Type: based on geomerty, imported, standalone
+- Shape (if mesh is based on geometry)
+- File (if mesh is imported from the file)
+- Groups
+- Sub-meshes
+
+\image html addinfo_mesh.png
+<center><em>"Additional Info" page, mesh information</em></center>
+<br>
+
+For sub-mesh object, the following information is shown:
+- Name
+- Parent mesh
+- Shape
+
+\image html addinfo_submesh.png
+<center><em>"Additional Info" page, sub-mesh information</em></center>
+<br>
+
+For group object, the following information is shown:
+- Name
+- Parent mesh
+- Type: standalone, group on geometry, group on filter
+- Entity type: node, edge, face, volume
+- Size
+- Color
+- Number of underlying nodes (for non-nodal groups)
+
+\image html addinfo_group.png
+<center><em>"Additional Info" page, group information</em></center>
+<br>
+
+\note For the performance reasons, number of underlying nodes is
+computed only by demand. For this, the user should press the "Compute"
+button (see picture). Also, number of underlying nodes is
+automatically calculated if the size of the group does not exceed
+limit set via the preferences - "Mesh information" group,
+"Automatic nodes compute limit" item (zero value means no limit).
+
 In case you get <b>Mesh Information</b> via a TUI script, the information is
 displayed in the Python Console. 
 <b>See the</b> \ref tui_viewing_mesh_infos "TUI Example".