While there is a way for you to open two Excel workbooks at the same time, you can also open multiple spreadsheets in separate windows. Learn how!

In Excel 2010, click the "File" tab, click "Save As," and choose "CSV" as the file type. This method will save the topmost worksheet as a comma-separated values file.

Just as in previous versions of Excel, if you want the Ribbon commands to go away, press Ctrl-F1 or click the name of the tab you’re currently on. (The tabs above the Ribbon — File, Home ...

Microsoft Excel offers many ways for you to manipulate and organize data, including using multiple "sheets" or tabs within the same spreadsheet file.