Printers can print in portrait or landscape mode. In portrait mode, which is the default, the printer prints pages that are 8.5″ wide and 11″ tall. In landscape mode, the page is turned on its side. This mode may be useful if you are trying to print a spreadsheet or sign that is wider than it is long.
To switch to landscape mode before printing a document, open the Page Setup dialog box (File, Page Setup), then select the option you want (Portrait or Landscape) by clicking on one of the icons in the Orientation Section.