+\note For the performance reasons, the number of underlying nodes is
+computed only by demand. For this, the user should press the "Compute"
+button (see picture). Also, the number of underlying nodes is
+automatically calculated if the size of the group does not exceed
+the \ref nb_nodes_limit_pref "Automatic nodes compute limit"
+preference value (zero value means no limit).
+
+\anchor mesh_quality_info_anchor
+<h2>Quality Information</h2>
+
+The <b>Quality Info</b> tab provides overall information about mesh quality controls on the selected object - mesh, sub-mesh or mesh group:
+- Name;
+- Nodes information:
+ - Number of free nodes;
+ - Maximal number of elements connected to a node;
+ - Number of double nodes;
+- Edges information:
+ - Number of double edges;
+- Faces information:
+ - Number of double faces;
+ - Number of over-constrained faces;
+ - Aspect Ratio histogram;
+- Volume information:
+ - Number of double volumes;
+ - Number of over-constrained volumes;
+ - Aspect Ratio 3D histogram.
+
+<center>\image html ctrlinfo.png
+<em>"Quality Info" page</em></center>
+
+\note It is possible to change <b>Double nodes tolerance</b>, which
+will be used upon consequent pressing \a Compute button. The default value
+of the tolerance can be set via the
+\ref dbl_nodes_tol_pref "Quality controls" preferences.
+
+\note For performance reasons, all quality control values for big
+meshes are computed only by demand. For this, press the \a Compute
+button. Also, values are automatically computed if the number of nodes
+/ elements does not exceed the
+\ref auto_control_limit_pref "Automatic controls compute limit" set
+via the \ref mesh_information_pref "Mesh information" preferences
+(zero value means that there is no limit).
+
+\note The plot functionality is available only if the GUI module is
+built with Plot 2D Viewer (option SALOME_USE_PLOT2DVIEWER is ON when
+building GUI module).
+
+See the \ref tui_viewing_mesh_infos "TUI Example".
+
+*/
+