While attempting to open some Excel files on your computer, you must have seen the Compatibility Mode message being displayed in the title bar of the file. It’s often mistaken as a warning ...

While you are using a file in compatibility mode, grayed-out menu choices ... Click the "Office" button and choose "Convert" to change the file to the Excel 2007 format. Excel gives users the ...

Any change to Excel, including an updated ... set the spreadsheet to Version 1 compatibility mode when the spreadsheet is first created. It's good to see file compatibility prioritized in Excel.