Unformatted text preview: . Once this setting has been modified, file names will display their extension permanently. File extensions are always preceded by a period, referred to as a dot. For example, Excel 2007 and Excel 2010 files have a .xlsx extension; Excel 2003 a .xls extension. Check out other safe computing practices at http://safecomputing.umn.edu/ Excel Best Practices Save regularly , especially when you are satisfied with your work. Always use cell references in formulas , not hard coded numbers, so formulas update automatically when data changes. Always preview the worksheet, workbook, or selection before printing....
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- Spring '11
- Filename extension, Excel Best Practices, Windows Best Practice