<ViewExpander x:Name="viewExpander" DataContext="{Binding ViewExpanderViewModel}" 
                                       Grid.Column="2" Grid.Row="1" Grid.RowSpan="3" HorizontalAlignment="Right" Grid.ZIndex="1"/>
                                       
                                        <Button DataContext="{Binding ViewExpanderViewModel}" Command="{Binding Path=DeactivateHelpOverlayCommand}" Grid.ZIndex="0"
            Grid.RowSpan="4" Grid.ColumnSpan="3" Visibility="Hidden" Background="{StaticResource HelpOverlayBackgroundColor}">
        <Button.Style>
            <Style>
                <Style.Triggers>
                    <DataTrigger Binding="{Binding Path=HelpActive}" Value="True">
                        <DataTrigger.EnterActions>
                            <BeginStoryboard>
                                <Storyboard FillBehavior="Stop">
                                    <ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="Visibility">
                                        <DiscreteObjectKeyFrame KeyTime="0:0:0" Value="{x:Static Visibility.Visible}"/>
                                    </ObjectAnimationUsingKeyFrames>
                                    <DoubleAnimation Storyboard.TargetProperty="Opacity" To="0.6" Duration="0:0:0.3"/>
                                </Storyboard>
                            </BeginStoryboard>
                        </DataTrigger.EnterActions>
                    </DataTrigger>
                    <DataTrigger Binding="{Binding Path=HelpActive}" Value="False">
                        <DataTrigger.EnterActions>
                            <BeginStoryboard>
                                <Storyboard FillBehavior="Stop">
                                    <DoubleAnimation Storyboard.TargetProperty="Opacity" To="0.0" Duration="0:0:0.3"/>
                                    <ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="Visibility">
                                        <DiscreteObjectKeyFrame KeyTime="0:0:0.3" Value="{x:Static Visibility.Hidden}"/>
                                    </ObjectAnimationUsingKeyFrames>
                                </Storyboard>
                            </BeginStoryboard>
                        </DataTrigger.EnterActions>
                    </DataTrigger>
                </Style.Triggers>
            </Style>
        </Button.Style>

    </Button>

 <Canvas x:Name="ViewExpanderMain" Width="{StaticResource ViewExpanderHelpWidth}" Height="{StaticResource ViewExpanderHelpHeight}" 
            Visibility="{Binding ElementName=ViewsListBox, Path=HasItems, Converter={StaticResource BoolToVisConv}}">
        <Canvas.RenderTransform>
            <TranslateTransform>
                <TranslateTransform.Y>-60</TranslateTransform.Y>
            </TranslateTransform>
        </Canvas.RenderTransform>

        <Canvas x:Name="ScrollCanvas" Background="Transparent" Canvas.ZIndex="50"
                Canvas.Top="90" Canvas.Right="0" Width="180" Height="530">
            <Canvas.RenderTransform>
                <TranslateTransform>
                    <TranslateTransform.X>160</TranslateTransform.X>
                </TranslateTransform>
            </Canvas.RenderTransform>
            <Path Opacity="0.8" Fill="AntiqueWhite" StrokeThickness="0" StrokeDashCap="Round" Data="m0,0 v120 l20,30 v380 h162 v-530"/>
            <ToggleButton x:Name="InfoButton" Canvas.Top="11" Canvas.Left="3" Width="16" Height="16" Background="Transparent"
                          IsChecked="{Binding Path=HelpActive, Mode=TwoWay}"/>
            <ToggleButton x:Name="PinButton" Canvas.Top="29" Canvas.Left="3" Width="16" Height="16"/>
            <StackPanel Canvas.Left="22" Canvas.Top="10" Width="160" Height="518">
                <Button x:Name="PageUpButton" Height="16" Style="{StaticResource ScrollButtonStyle}" Click="PageUpButton_OnClick">
                    <Path Data="M0,5 l10,-3 l10,3" StrokeThickness="1" Stroke="White"/>
                </Button>
                <ListBox x:Name="ViewsListBox" ScrollViewer.VerticalScrollBarVisibility="Hidden" Height="486" BorderThickness="0"
                         ItemsSource="{Binding Path=ViewListEntries, Mode=OneWay}" Background="Gray">
                    <ListBox.ItemContainerStyle>
                        <Style TargetType="ListBoxItem" BasedOn="{StaticResource {x:Type ListBoxItem}}">
                            <Setter Property="Padding" Value="0"/>
                            <Setter Property="BorderThickness" Value="0"/>
                            <Setter Property="Margin" Value="0,4,0,4"/>
                        </Style>
                    </ListBox.ItemContainerStyle>
                    <ListBox.ItemTemplate>
                        <DataTemplate>
                            <Button Width="160" Height="90" Style="{StaticResource ViewImageButton}">
                                <Canvas>
                                    <Image Source="{Binding Path=ViewTexture}" Width="160" Height="90" />
                                    <Border Opacity="0.8" Background="Black" Canvas.Top="70" Canvas.Left="30" Width="130" Height="20" CornerRadius="10,0,0,0"/>
                                    <TextBlock Canvas.Top="73" Canvas.Left="40" Width="110" Height="25" Foreground="White" FontSize="13" FontWeight="ExtraLight" Text="{Binding ViewName}" TextTrimming="CharacterEllipsis"/>
                                </Canvas>
                            </Button>
                        </DataTemplate>
                    </ListBox.ItemTemplate>
                </ListBox>
                <Button x:Name="PageDownButton" Height="16" Style="{StaticResource ScrollButtonStyle}" Click="PageDownButton_OnClick">
                    <Path Data="M0,0 l10,3 l10,-3" StrokeThickness="1" Stroke="White"/>
                </Button>
            </StackPanel>
        </Canvas>
    </Canvas>

void GLRenderDevice::FillCaps()
{
    m_caps = {};
    ...
    //! @note we suppress half float uv usage due to precision issues!
    m_caps.halfFloatUV = false; // IsSupported(Extension::ARB_half_float_vertex) || IsSupported(Extension::OES_vertex_half_float), 
    ...
}