PageSetup.GutterStyle procedure builder

PageSetup.GutterStyle (Word)

Returns or sets whether Microsoft Word uses gutters for the current document based on a right-to-left language or a left-to-right language.

wdGutterStyleBidi - Bidirectional gutter should be used to conform to right-to-left text flow, wdGutterStyleLatin - Latin gutter should be used to conform to left-to-right text flow.
ActiveDocument.PageSetup.GutterStyle = wdGutterStyleBidi