To change the orientation of the whole document, select Layout > Orientation. Choose Portrait or Landscape.
Step 1: Open Word 2016. Step 2: Click the Layout tab at the top of the window. Step 3: Click the Page Setup button at the bottom-right corner of the Page Setup section of the ribbon. Step 4: Click the Landscape option under Orientation, then click the Set as Default button at the bottom-left corner of the window.