In Excel page setup options can help you make your worksheet look more professional. Learn all about using the page setup feature in Excel here.
The page margins define where on the page Excel will print the worksheet. By default, the top and bottom margins are set at 1 inch in Excel 2003, while the left and right margins are set at .75 inch. Margin settings can be changed to whatever you want. Different margins can be defined for each worksheet in the workbook.