Properties which apply to the UINotebook or Stacked Flow web page, which is a web page containing one or more NotebookTab pages, or a Stacked Web page interface, depending on the template selected in the PageTemplate property.
Stacked web pages are a workflow interface that behave like a progressive tabbed page that grows from the top as the user navigates through a set of pages (that can be different depending on the host screens displayed based on user actions and underlying data).
User Interface
Web User Interface