ParagraphFormat.TextDirection (PowerPoint)

Returns or sets the text direction for the specified paragraph. Possible return values are ppDirectionLeftToRight - Left-to-right layout, ppDirectionMixed - Mixed layout, ppDirectionRightToLeft - Right-to-left layout.

The default value depends on the language support you have selected or installed. The value of the TextDirection property can be one of these PpDirection constants.

ActiveWindow.Selection.TextRange.ParagraphFormat.TextDirection = ppDirectionLeftToRight