Hi Alex,

I am trying to style the field splitter from the DefaultStyles provided as per the attached requirement. I am finding problem with the splitter taking up space of the header area. Is it possible for the splitter not to take up the header space at all. 

The XAML style is as below.

<!-- ___________________________ Fixed Field Splitter Style ___________________________ -->

            <Style TargetType="{x:Type igDP:FixedFieldSplitter}">               

                <Setter Property="Template">

                    <Setter.Value>

                        <ControlTemplate TargetType="{x:Type igDP:FixedFieldSplitter}">

                            <Grid Background="Transparent">

                                <Border x:Name="splitterMainBd" Background="Transparent" BorderBrush="Transparent"

                                        BorderThickness="0" Padding="0" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"/>

                                <Border x:Name="splitterHoverBd" BorderBrush="Transparent" BorderThickness="0" Opacity="0"

                                        Padding="0" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"

                                        Background="Transparent"/>

                                <Border x:Name="innerStroke" Margin="0" BorderBrush="Transparent" BorderThickness="0" Opacity="0"/>

                                <Grid x:Name="gripperLinesVertical" Visibility="Collapsed" HorizontalAlignment="Center">                                   

                                    <Border Width="25" Height="10" HorizontalAlignment="Center" VerticalAlignment="Bottom"

                                            Background="Red" />

                                </Grid>

                                <Grid x:Name="gripperLinesHorizontal" Visibility="Collapsed" VerticalAlignment="Center" Margin="0,1,0,0">

                                    <Grid.ColumnDefinitions>

                                        <ColumnDefinition Width="0.15*"/>

                                        <ColumnDefinition Width="0.7*"/>

                                        <ColumnDefinition Width="0.15*"/>

                                    </Grid.ColumnDefinitions>

                                    <Border

                                                Height="2"

                                                Grid.Column="1"

                                                HorizontalAlignment="Stretch"

                                                Margin="0,0,0,2"

                                                VerticalAlignment="Center"

                                                Background="{DynamicResource {x:Static igDP:DataPresenterBrushKeys.FixedFieldsSplitterGripperDarkLineBrush}}"

                                                BorderBrush="{DynamicResource {x:Static igDP:DataPresenterBrushKeys.FixedFieldsSplitterGripperLightLineBrush}}"

                                                BorderThickness="0,0,0,1"/>

                                    <Border

                                                Height="2"

                                                Grid.Column="1"

                                                HorizontalAlignment="Stretch"

                                                Margin="0,2,0,0"

                                                VerticalAlignment="Center"

                                                Background="{DynamicResource {x:Static igDP:DataPresenterBrushKeys.FixedFieldsSplitterGripperDarkLineBrush}}"

                                                BorderBrush="{DynamicResource {x:Static igDP:DataPresenterBrushKeys.FixedFieldsSplitterGripperLightLineBrush}}"

                                                BorderThickness="0,0,0,1"/>

                                </Grid>

                            </Grid>

                            <ControlTemplate.Triggers>

                                <MultiTrigger>

                                    <MultiTrigger.Conditions>

                                        <Condition Property="Orientation" Value="Vertical"/>

                                        <Condition Property="IsInHeader" Value="True"/>

                                    </MultiTrigger.Conditions>

                                    <Setter TargetName="gripperLinesVertical" Property="Visibility" Value="Visible"/>

                                    <Setter TargetName="splitterMainBd" Property="Visibility" Value="Collapsed"/>

                                </MultiTrigger>                               

                            </ControlTemplate.Triggers>

                        </ControlTemplate>

                    </Setter.Value>

                </Setter>

                <Style.Triggers>

                    <Trigger Property="Orientation" Value="Vertical">

                        <Setter Property="MinWidth" Value="7" />

                        <Setter Property="BorderThickness" Value="1,0,1,0"/>

                        <Setter Property="Background" Value="{DynamicResource {x:Static igDP:DataPresenterBrushKeys.FixedFieldsSplitterVerticalFillBrush}}"/>

                        <Setter Property="Cursor" Value="Hand" />

                    </Trigger>

                </Style.Triggers>

            </Style>

            <!-- ___________________________ Fixed Field Splitter Style ___________________________ -->