Styling the header row

[Yovko]

 Hi, I've followed Telerik's guide for styling the GridView's Header row and everything
seems to work fine, but there's one column I was unable to remove it appears as black line "see the attached picture".
Where is this in the template?
and how to remove it?

<ControlTemplate TargetType="{x:Type telerik:GridViewHeaderRow}">
					<telerik:SelectiveScrollingGrid>
						<telerik:SelectiveScrollingGrid.ColumnDefinitions>
							<ColumnDefinition Width="11"/>
							<ColumnDefinition Width="14"/>
							<ColumnDefinition Width="Auto"/>
							<ColumnDefinition Width="Auto"/>
							<ColumnDefinition Width="*"/>
						</telerik:SelectiveScrollingGrid.ColumnDefinitions>
						<telerik:SelectiveScrollingGrid.RowDefinitions>
							<RowDefinition Height="Auto"/>
							<RowDefinition/>
						</telerik:SelectiveScrollingGrid.RowDefinitions>
						<telerik:CommonHeaderPresenter x:Name="PART_CommonHeaderPresenter" Grid.Column="4" IsTabStop="False" Grid.Row="1" d:LayoutOverrides="GridBox">
							
						</telerik:CommonHeaderPresenter>
						<Border x:Name="CommonHeaderIndent" BorderBrush="#00848484" BorderThickness="0" Background="{StaticResource Common_Background}" Grid.ColumnSpan="2" telerik:SelectiveScrollingGrid.SelectiveScrollingOrientation="Vertical" Visibility="{Binding Visibility, ElementName=PART_CommonHeaderPresenter}" Grid.Row="1" d:LayoutOverrides="GridBox"/>
						<Grid x:Name="PART_OuterGrid" Grid.ColumnSpan="5" Grid.Row="1">
							<Grid.RowDefinitions>
								<RowDefinition Height="*"/>
								<RowDefinition Height="*"/>
							</Grid.RowDefinitions>
							<Border x:Name="PART_GridViewHeaderRowBorder" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="0" HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}" Padding="{TemplateBinding Padding}" VerticalAlignment="{TemplateBinding VerticalContentAlignment}">
								<Border BorderBrush="#004B4B4B" BorderThickness="0" Background="{StaticResource Common_Background}"/>
							</Border>
						</Grid>
						<telerik:DataCellsPresenter x:Name="PART_DataCellsPresenter" Grid.Column="4" IsTabStop="False" Grid.Row="1">
							
						</telerik:DataCellsPresenter>
						<Border x:Name="PART_IndicatorPresenter" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="0" Grid.Row="1" telerik:SelectiveScrollingGrid.SelectiveScrollingOrientation="Vertical" Visibility="{TemplateBinding RowIndicatorVisibility}" Width="25" Grid.ColumnSpan="2">
							<Border BorderBrush="#004B4B4B" BorderThickness="0" Background="{StaticResource Common_Background}">
								
							</Border>
						</Border>
						<telerik:IndentPresenter x:Name="PART_IndentPresenter" Grid.Column="4" IsTabStop="False" IndentLevel="{TemplateBinding IndentLevel}" MinHeight="{TemplateBinding MinHeight}" Grid.Row="1" telerik:SelectiveScrollingGrid.SelectiveScrollingOrientation="Vertical" d:LayoutOverrides="GridBox">
							<telerik:IndentPresenter.ItemTemplate>
								<DataTemplate>
									<telerik:GridViewHeaderIndentCell IsTabStop="False">
										
									</telerik:GridViewHeaderIndentCell>
								</DataTemplate>
							</telerik:IndentPresenter.ItemTemplate>
							
						</telerik:IndentPresenter>
						<Border x:Name="PART_CommonHeaderHierarchyIndentPresenterAllLevels" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="0" Background="{StaticResource Common_Background}" Grid.Column="4" Grid.Row="1" Grid.RowSpan="1" telerik:SelectiveScrollingGrid.SelectiveScrollingOrientation="Vertical" Width="25" Margin="0,0,233.907,0">
							<Border.Visibility>
								<Binding Path="HasHierarchy" RelativeSource="{RelativeSource TemplatedParent}">
									<Binding.Converter>
										<telerik:BooleanToVisibilityConverter/>
									</Binding.Converter>
								</Binding>
							</Border.Visibility>
						</Border>
						<Border x:Name="PART_CommonHeaderHierarchyIndentPresenterFirstLevel" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="0" Background="{StaticResource Common_Background}" Grid.Column="4" Margin="0,-1,233.907,0" Grid.Row="0" Grid.RowSpan="1" telerik:SelectiveScrollingGrid.SelectiveScrollingOrientation="Vertical" Width="25" d:LayoutOverrides="GridBox">
							<Border.Visibility>
								<Binding Path="HasHierarchy" RelativeSource="{RelativeSource TemplatedParent}">
									<Binding.Converter>
										<telerik:BooleanToVisibilityConverter/>
									</Binding.Converter>
								</Binding>
							</Border.Visibility>
						</Border>
						<Border x:Name="PART_HierarchyIndentPresenter" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="0" Grid.Column="4" Grid.Row="1" telerik:SelectiveScrollingGrid.SelectiveScrollingOrientation="Vertical" Width="25" Margin="0,0,233.907,0" d:LayoutOverrides="GridBox">
							<Border.Visibility>
								<Binding Path="HasHierarchy" RelativeSource="{RelativeSource TemplatedParent}">
									<Binding.Converter>
										<telerik:BooleanToVisibilityConverter/>
									</Binding.Converter>
								</Binding>
							</Border.Visibility>
							<Border BorderBrush="#004B4B4B" BorderThickness="0" Background="{StaticResource Common_Background}" />
						</Border>
					</telerik:SelectiveScrollingGrid>
				</ControlTemplate>

[Yovko]

To answer my own question:
CanUserFreezeColumns="False" removes this.
But still I want to now where it is, in case I want to style it. :)

[Dimitrina]

Hello,

This element is a "FrozenColumnsSplitter". I would suggest you to check this forum thread where a similar topic has been discussed.
 

Regards,
Didie
Telerik