Adding custom fields to the footer (line/column bar at the bottom)

Version=20.1.1.0 (Unsure of year)

How can I add custom data to the horizontal bar at the bottom of the script editor that shows the line number and column?

I think this is considered one of the "margins" (maybe SelectionMargin) but I'm not really sure which, in addition to not being sure how to add a label and data point. I don't seem to be able to access any of the margins from the SyntaxEditor XAML or a handle to the editor's name. 

I want to keep Line Number & Column Number. I just want to add another data point. 

            <syntax:SyntaxEditor Name="m_scriptText" DocumentTextChanged="OnDocumentTextChanged" DocumentTextChanging="OnDocumentTextChanging" Grid.Row="0" Margin="0" AcceptsTab="True" PreviewMouseLeftButtonUp="OnScriptTextPreviewMouseLeftButtonUp"
                                 FontFamily="{Binding FixedWidthFontFamily, Source={x:Static ui:GUIManager.Defaults}}" FontSize="14" ViewSelectionChanged="OnViewSelectionChanged" IsDelimiterHighlightingEnabled="True" CanSplitHorizontally="True"
                                 IsOutliningMarginVisible="True" IsLineNumberMarginVisible="True" IsIndicatorMarginVisible="True" IsRulerMarginVisible="False">
            </syntax:SyntaxEditor>