When you type a seven-or-ten-digit phone number into an Excel cell that uses the phone number format, Excel will automatically change the way the number looks so that it appears as a phone number.

You can put a circle around a number in Excel, using the Illustration feature, using Symbol or using the Quick Access Toolbar. Learn how!

You can sum a series of numbers in Microsoft Excel manually by typing in a simple formula, or automatically with a tool.

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.