How to Adjust Margins and Orientation in Excel
Margins are the empty space between the worksheet data and the left, right, top, and bottom edges of the printed page. You can manually adjust them to add more or less space around your worksheet data.
By default, the margins are 0.75 inches at the top and bottom, and 0.70 inches to the left and right.
If you don’t see a margin size that works, select Custom Margins to display the Page Setup dialog box. Here you can set your own custom margins.
Portrait orientation is the default setting for printing worksheets, but you may want to use landscape orientation instead.