diff --git a/StructureHelper/Windows/Graphs/MaterialDiagramView.xaml b/StructureHelper/Windows/Graphs/MaterialDiagramView.xaml
index 71e550d..01ec433 100644
--- a/StructureHelper/Windows/Graphs/MaterialDiagramView.xaml
+++ b/StructureHelper/Windows/Graphs/MaterialDiagramView.xaml
@@ -50,7 +50,7 @@
                     <Button.ToolTip>
                         <uc:ButtonToolTipEh HeaderText="Show diagram's areas"
                                                 IconContent="{StaticResource GetArea}"
-                                                DescriptionText="Show areas of regions under diagrams (represent energy of deformation of material)"/>
+                                                DescriptionText="Show areas of regions under diagrams (represents energy of deformation of material)"/>
                     </Button.ToolTip>
                     <Viewbox>
                         <ContentControl ContentTemplate="{StaticResource GetArea}"/>
diff --git a/StructureHelper/Windows/Graphs/MaterialDiagramViewModel.cs b/StructureHelper/Windows/Graphs/MaterialDiagramViewModel.cs
index 4e9ab80..23403cb 100644
--- a/StructureHelper/Windows/Graphs/MaterialDiagramViewModel.cs
+++ b/StructureHelper/Windows/Graphs/MaterialDiagramViewModel.cs
@@ -257,10 +257,7 @@ namespace StructureHelper.Windows.Graphs
                         var chartValues = new ChartValues<double>();
                         for (double s = minValue; s < maxValue; s += step)
                         {
-                            //var trueStep = s * factor;
                             double diagramValue = Math.Round(loaderMaterial.Diagram.Invoke(loaderMaterial.DiagramParameters, s * factor)) * factor * UnitConstants.Stress;
-                            //var point = new PointF() { X = (float)s, Y = (float)diagramValue };
-                            //chartValues.Add(point);
                             chartValues.Add(diagramValue);
                             labels.Add(Convert.ToString(Math.Round(s, 4)));
                         }