Tgood37 asked the Answer Line forum how to add checkboxes to Excel spreadsheets, and make sure that checking a box will have an effect.

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.

While they might look like an advanced feature, it's very easy to add data bars to a spreadsheet in Excel with just a few clicks.