Choose View - Styles and Formatting.
Click the Page Styles icon.
Right-click a page style and choose New. The new page style initially gets all properties of the selected page style.
On the Organizer tab page, type a name for the page style in the Name box, for example “My Landscape”.
In the
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Next Style box, select the page style that you want to apply to the next page that follows a page with the new style. See the section about the scope of page styles at the end of this help page.
Click the Page tab. -
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Under Paper format, select “Portrait” or “Landscape”.
Click OK.