Saving the workbook
It is good practice to save your workbook as soon as you can, and then to regularly save it to protect against data loss.
To save your document click the Save icon on the Quick Access Toolbar or press Ctrl + S. If you are saving the workbook for the first time, the Save As dialogue box will appear.
Select a location to save the workbook in, and an appropriate name which will make recognising this workbook easy in the future, and click Save.
The Title Bar now displays the name of the workbook.
From now on whenever you save the workbook, Excel will just update the workbook previously saved.
Saving in a Previous Version
Excel 2007 workbooks use a different file format to previous versions of Excel. This can cause some compatibility issues when users of previous versions open Excel 2007 workbooks.
It is possible to save the workbook in the 97-2003 file format so that it is more widely compatible.
Click the Office Button > Save As > Excel 97-2003 Workbook
The Save As dialogue box will appear as before. Select a location to save the workbook in and an appropriate name and click Save.
When saving a workbook in a previous format the Compatibility Checker will identify any potential problems.
In the example below it has identified the use of some conditional formatting within the workbook. It warns us that some of the conditional formatting is not supported and that another condition will not function fully.
You then have the option to either continue or to cancel your save.
Once saved, the Compatibility Checker can be run at anytime. Click the Office Button, Prepare and then Run Compatibility Checker.