Setting Page Orientation and Scale
As you look at your worksheet and think about how you want it to appear on the printed page, be aware that you have the choice of printing in a vertical format (portrait mode) or a horizontal format (landscape mode). Landscape mode is particularly useful when you have a lot of columns in your worksheet, such as in a worksheet storing customer contact or product sales information. You can fit your worksheet onto a specific number of printed pages, which helps if you have been allotted a fixed number of pages in which to present your data in a typeset report.
Set Page Orientation
Click the Page Layout tab.
Click Orientation. ...