Page Orientation in Excel 2010
Page orientation refers to how output is printed on the page. If you change the orientation, the onscreen page breaks adjust automatically to accommodate the new paper orientation.
Types of Page Orientation
Portrait: Portrait to print tall pages (the default).
Landscape: Landscape to print wide pages. Landscape orientation is useful when you have a wide range that doesn’t fit on a vertically oriented page.
Changing Page Orientation
Choose Page Layout » Page Setup » Orientation » Portrait or Landscape
Choose File » Print