https://learn.microsoft.com/en-us/previous-versions/office/developer/office-2003/aa221968(v=office.11)
HeaderFooter Object | Microsoft Docs
objectmicrosoftdocs
https://help.syncfusion.com/cr/uwp/Syncfusion.UI.Xaml.RichTextBoxAdv.HeaderFooter.html
Class HeaderFooter - UWP API Reference | Syncfusion
Represents the HeaderFooter class.
api referenceclassuwpsyncfusion