Applies the previous heading level style (Heading 1 through Heading 8) to the specified paragraph or paragraphs. For example, if a paragraph is formatted with the Heading 2 style, this method promotes the paragraph by changing the style to Heading 1.
expression.OutlinePromote
expression Required. An expression that returns a Paragraph or Paragraphs object.
This example promotes the selected paragraphs.
Selection.Paragraphs.OutlinePromote
This example switches the active window to outline view and promotes the first paragraph in the active document.
ActiveDocument.ActiveWindow.View.Type = wdOutlineView
ActiveDocument.Paragraphs(1).OutlinePromote