diff --git a/StructureHelper/Windows/Graphs/GraphService.cs b/StructureHelper/Windows/Graphs/GraphService.cs
index 4fcd557..d7b8fe4 100644
--- a/StructureHelper/Windows/Graphs/GraphService.cs
+++ b/StructureHelper/Windows/Graphs/GraphService.cs
@@ -22,7 +22,7 @@ namespace StructureHelper.Windows.Graphs
             lineSeries.LineSmoothness = visualProps.LineSmoothness;
             lineSeries.PointGeometry = DefaultGeometries.Circle;
             lineSeries.PointGeometrySize = visualProps.StrokeSize;
-            Color lineColor = (lineSeries.Stroke as SolidColorBrush)?.Color ?? Colors.Black;
+            Color lineColor = (lineSeries.Stroke as SolidColorBrush)?.Color ?? Colors.LightGray;
             //lineSeries.Fill = new SolidColorBrush(lineColor) { Opacity = visualProps.Opacity };
             lineSeries.Fill = new SolidColorBrush(lineColor) { Opacity = visualProps.Opacity };
             
diff --git a/StructureHelper/Windows/Graphs/GraphVisualProps.cs b/StructureHelper/Windows/Graphs/GraphVisualProps.cs
index 5556372..ad43329 100644
--- a/StructureHelper/Windows/Graphs/GraphVisualProps.cs
+++ b/StructureHelper/Windows/Graphs/GraphVisualProps.cs
@@ -49,7 +49,6 @@ namespace StructureHelper.Windows.Graphs
                 OnPropertyChanged(nameof(Opacity));
             }
         }
-
         public GraphVisualProps()
         {
             MaxLineSmoothness = 1d;
diff --git a/StructureHelper/Windows/MainGraph/GraphView.xaml b/StructureHelper/Windows/MainGraph/GraphView.xaml
index e9206f2..a403c4d 100644
--- a/StructureHelper/Windows/MainGraph/GraphView.xaml
+++ b/StructureHelper/Windows/MainGraph/GraphView.xaml
@@ -20,6 +20,7 @@
         </Grid.ColumnDefinitions>
         <Grid.RowDefinitions>
             <RowDefinition Height="*"/>
+            <RowDefinition Height="170"/>
             <RowDefinition Height="100"/>
         </Grid.RowDefinitions>
         <ListView Name="FunctionList"
@@ -120,7 +121,10 @@
                 </ContextMenu>
             </ListView.ContextMenu>
         </ListView>
-        <Grid Grid.Row="1" Grid.Column="0">
+        <ContentControl Grid.Row="1" 
+                        ContentTemplate="{StaticResource ResourceKey=LineVisualProperties}" 
+                        Content="{Binding VisualProps}"/>
+        <Grid Grid.Row="2" Grid.Column="0">
             <Grid.ColumnDefinitions>
                 <ColumnDefinition Width="100"/>
                 <ColumnDefinition Width="100"/>
@@ -153,7 +157,7 @@
                     Command="{Binding TreeCommand}"
                     Background="AntiqueWhite"/>
         </Grid>
-        <lvc:CartesianChart Grid.Row="0" Grid.Column="1"
+        <lvc:CartesianChart Grid.Row="0" Grid.Column="1" Grid.RowSpan="2"
                             Series="{Binding SeriesCollection, UpdateSourceTrigger=PropertyChanged}" Margin="5"
                             Zoom="Xy">
             <lvc:CartesianChart.AxisY>
@@ -163,7 +167,7 @@
                 <lvc:Axis Title="X"  Labels="{Binding Labels, UpdateSourceTrigger=PropertyChanged}"></lvc:Axis>
             </lvc:CartesianChart.AxisX>
         </lvc:CartesianChart>
-        <Grid Grid.Row="1" Grid.Column="1">
+        <Grid Grid.Row="2" Grid.Column="1">
             <Grid.RowDefinitions>
                 <RowDefinition Height="30"/>
                 <RowDefinition Height="70"/>
diff --git a/StructureHelper/Windows/MainGraph/GraphViewModel.cs b/StructureHelper/Windows/MainGraph/GraphViewModel.cs
index 6a476b0..d0cad49 100644
--- a/StructureHelper/Windows/MainGraph/GraphViewModel.cs
+++ b/StructureHelper/Windows/MainGraph/GraphViewModel.cs
@@ -1,6 +1,7 @@
 using LiveCharts;
 using LiveCharts.Wpf;
 using StructureHelper.Infrastructure;
+using StructureHelper.Windows.Graphs;
 using StructureHelper.Windows.TreeGraph;
 using StructureHelperCommon.Infrastructures.Enums;
 using StructureHelperCommon.Infrastructures.Interfaces;
@@ -17,15 +18,26 @@ namespace StructureHelper.Windows.MainGraph
 {
     public class GraphViewModel : ViewModelBase
     {
+        private LineSeries lineSeries;
         private SeriesCollection seriesCollection;
         private List<string> labels;
+        private GraphVisualProps visualProps = new();
+        public LineSeries LineSeries
+        {
+            get => lineSeries;
+            set
+            {
+                lineSeries = value;
+                OnPropertyChanged(nameof(lineSeries));
+            }
+        }
         public SeriesCollection SeriesCollection
         {
             get => seriesCollection;
             set
             {
                 seriesCollection = value;
-                OnPropertyChanged(nameof(seriesCollection));
+                OnPropertyChanged(nameof(SeriesCollection));
             }
         }
         public List<string> Labels
@@ -37,6 +49,15 @@ namespace StructureHelper.Windows.MainGraph
                 OnPropertyChanged(nameof(labels));
             }
         }
+        public GraphVisualProps VisualProps 
+        { 
+            get => visualProps;
+            set
+            {
+                visualProps = value;
+                DrawGraph();
+            }
+        }
         private IOneVariableFunction selectedFunction;
         public IOneVariableFunction SelectedFuntion
         {
@@ -219,7 +240,10 @@ namespace StructureHelper.Windows.MainGraph
         {
             var graphSettings = SelectedFuntion.GetGraphSettings();
             Labels = graphSettings.GetLabels();
-            SeriesCollection = graphSettings.GetSeriesCollection();
+            LineSeries = graphSettings.GetLineSeries();
+            GraphService.SetVisualProps(LineSeries, VisualProps);
+            SeriesCollection = new SeriesCollection();
+            SeriesCollection.Add(LineSeries);
         }
     }
 }
diff --git a/StructureHelper/Windows/TreeGraph/TreeGraphView.xaml b/StructureHelper/Windows/TreeGraph/TreeGraphView.xaml
index 822f88d..05930ab 100644
--- a/StructureHelper/Windows/TreeGraph/TreeGraphView.xaml
+++ b/StructureHelper/Windows/TreeGraph/TreeGraphView.xaml
@@ -16,6 +16,7 @@
         </Grid.ColumnDefinitions>
         <Grid.RowDefinitions>
             <RowDefinition Height="*"/>
+            <RowDefinition Height="170"/>
             <RowDefinition Height="50"/>
         </Grid.RowDefinitions>
         <TreeView Name="FunctionTreeView"
@@ -85,7 +86,10 @@
                 </ContextMenu>
             </TreeView.ContextMenu>
         </TreeView>
-        <Grid Grid.Row="1" Grid.Column="0">
+        <ContentControl Grid.Row="1" 
+                        ContentTemplate="{StaticResource ResourceKey=LineVisualProperties}" 
+                        Content="{Binding VisualProps}"/>
+        <Grid Grid.Row="2" Grid.Column="0">
             <Grid.ColumnDefinitions>
                 <ColumnDefinition Width="50"/>
                 <ColumnDefinition Width="50"/>
diff --git a/StructureHelper/Windows/TreeGraph/TreeGraphViewModel.cs b/StructureHelper/Windows/TreeGraph/TreeGraphViewModel.cs
index e5a23bc..5850979 100644
--- a/StructureHelper/Windows/TreeGraph/TreeGraphViewModel.cs
+++ b/StructureHelper/Windows/TreeGraph/TreeGraphViewModel.cs
@@ -13,11 +13,13 @@ using System.Threading.Tasks;
 using System.Windows.Input;
 using StructureHelperCommon.Models.Functions.Decorator;
 using System.Windows.Media;
+using StructureHelper.Windows.Graphs;
 
 namespace StructureHelper.Windows.TreeGraph
 {
     public class TreeGraphViewModel : ViewModelBase
     {
+        private LineSeries lineSeries;
         private SeriesCollection seriesCollection;
         private List<string> labels;
         readonly ObservableCollection<TreeViewItemViewModel> _firstGeneration;
@@ -47,7 +49,7 @@ namespace StructureHelper.Windows.TreeGraph
             set
             {
                 seriesCollection = value;
-                OnPropertyChanged(nameof(seriesCollection));
+                OnPropertyChanged(nameof(SeriesCollection));
             }
         }
         public List<string> Labels
@@ -59,6 +61,15 @@ namespace StructureHelper.Windows.TreeGraph
                 OnPropertyChanged(nameof(labels));
             }
         }
+        public LineSeries LineSeries
+        {
+            get => lineSeries;
+            set
+            {
+                lineSeries = value;
+                OnPropertyChanged(nameof(lineSeries));
+            }
+        }
         public TreeGraphView TreeGraphView_win
         { 
             get => _treeGraphView_win;
@@ -68,6 +79,7 @@ namespace StructureHelper.Windows.TreeGraph
         {
             get => _firstGeneration;
         }
+        public GraphVisualProps VisualProps { get; } = new GraphVisualProps();
         public ICommand GetYCommand
         {
             get => _getYCommand ??= new RelayCommand(o => GetY());
@@ -215,7 +227,10 @@ namespace StructureHelper.Windows.TreeGraph
             SelectedFuntion = selectedTreeViewItem.Function;
             var graphSettings = SelectedFuntion.GetGraphSettings();
             Labels = graphSettings.GetLabels();
-            SeriesCollection = graphSettings.GetSeriesCollection();
+            LineSeries = graphSettings.GetLineSeries();
+            GraphService.SetVisualProps(LineSeries, VisualProps);
+            SeriesCollection = new SeriesCollection();
+            SeriesCollection.Add(LineSeries);
         }
     }
 }
diff --git a/StructureHelperCommon/Models/Functions/FormulaFunction.cs b/StructureHelperCommon/Models/Functions/FormulaFunction.cs
index e4f8ef0..27eb451 100644
--- a/StructureHelperCommon/Models/Functions/FormulaFunction.cs
+++ b/StructureHelperCommon/Models/Functions/FormulaFunction.cs
@@ -103,7 +103,6 @@ namespace StructureHelperCommon.Models.Functions
         {
             double yValue = 0;
             current_xValue = xValue;
-            Check();
             yValue = Math.Round(Expression.CalculateValue(new double[] { xValue }), 2);
             return yValue;
         }
diff --git a/StructureHelperCommon/Services/GraphSettings.cs b/StructureHelperCommon/Services/GraphSettings.cs
index e4ef243..d571e14 100644
--- a/StructureHelperCommon/Services/GraphSettings.cs
+++ b/StructureHelperCommon/Services/GraphSettings.cs
@@ -33,7 +33,7 @@ namespace StructureHelperCommon.Services
             }
             return _labels;
         }
-        public SeriesCollection GetSeriesCollection()
+        public LineSeries GetLineSeries()
         {
             foreach (GraphPoint point in GraphPoints)
             {
@@ -41,9 +41,21 @@ namespace StructureHelperCommon.Services
             }
             _lineSeries.Values = _chartValues;
             _lineSeries.Stroke = new SolidColorBrush(_strokeColor);
+            _lineSeries.Fill = Brushes.Transparent;
+            return _lineSeries;
+        }
+        /*public SeriesCollection GetSeriesCollection()
+        {
+            foreach (GraphPoint point in GraphPoints)
+            {
+                _chartValues.Add(Math.Round(point.Y, 2));
+            }
+            _lineSeries.Values = _chartValues;
+            _lineSeries.Stroke = new SolidColorBrush(_strokeColor);
+            
             _lineSeries.Fill = Brushes.Transparent;
             _seriesCollection.Add(_lineSeries);
             return _seriesCollection;
-        }
+        }*/
     }
 }