Hello, MindFusion team!
Thank you for your efforts in helping transition to the new version of the charts. In the previous version it was easy to apply margin on diagram, but in newer it is not possible, as Diagram is not visual element anymore. I've tried setting margin property to DiagramView, but its actual bounds are located only within current viewport, so margin is applied to every side, no matter if there is scrollable content or not. What class should I modify to keep margin logic from the previous version?

Try applying margins to the DiagramPresenter, by customizing diagram view's Xaml template:

<mindfusion:Ruler
    HorizontalAlignment="Stretch"
    VerticalAlignment="Stretch">

    <mindfusion:DiagramView
        x:Name="DiagramView"
        HorizontalContentAlignment="Center">

        <mindfusion:DiagramView.Template>
            <ControlTemplate TargetType="{x:Type mindfusion:DiagramView}">

                <ScrollViewer
                    x:Name="PART_ScrollViewer"
                    CanContentScroll="True"
                    HorizontalScrollBarVisibility="Auto"
                    Focusable="False">

                    <mindfusion:DiagramPresenter
                        x:Name="PART_Presenter"
                        Margin="64"
                        HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}"
                        VerticalAlignment="{TemplateBinding VerticalContentAlignment}"/>

                </ScrollViewer>

            </ControlTemplate>

        </mindfusion:DiagramView.Template>
    </mindfusion:DiagramView>
</mindfusion:Ruler> 

Regards,
Slavcho
Mindfusion