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How to Open Excel 2007 Files As Separate Windows. If you work with multiple Excel files over the course of a workday, and especially if you use a dual-monitor setup, you might wonder how you can ...
You don't necessarily need Microsoft Excel to work with an .xlsx file This article explains what XLSX files are, how to open them, and which programs are able to convert them to other spreadsheet ...
Likewise, the venerable .xls Excel spreadsheet format gave way to .xlsx, and PowerPoint .ppt files became .pptx files.