How to Set a Password on Excel 2007

1. Open the Excel spreadsheet to which you want to add a password. Click the Microsoft Office Button, select 'Save' and select a location to save the spreadsheet.
2. Click the Microsoft Office Button, select 'Prepare' and choose 'Encrypt Document' from the list. An 'Encrypt Document' dialog box appears.
3. Enter a password into the text box and click 'OK.' Confirm the password on the next menu by entering it again into the text box and click 'OK.' If you entered the password correctly, the dialog box will disappear. Save the spreadsheet again.