You can insert or add Header and Footer in Excel spreadsheet using this tutorial. Insert page number, current date and time, etc.

Launch Microsoft Excel 2010 and open the spreadsheet you want to edit. Select the worksheet for which you want to insert the page number. Click the "View" tab on the upper side of the Excel window.

You may already know you can add a watermark to a Word document, but you might not know that you can also add a watermark to an Excel sheet. Here's how.