How to convert older Office documents to Office 2007 format?

The Office 2007 applications such as Word and Excel can open a spreadsheet or a document which is in an older edition of Office.  They can open such older version documents in Compatibility Mode. However, if you need to make use of various newer features available in Office 2007, you will have to convert older Office documents to Office 2007 format. The feature to covert older Office documents to Office 2007 format is very useful. For example, you can now utilize 1.1 million rows in the 2007 version of Excel. In the older versions you could only use sixty-five thousand rows.  The method to convert older Office documents to Office 2007 format is the same for all applications. Here we are using the example of a Word document of previous version. If you open a Word or Excel document of an older version, you see [Compatibility Mode] as part of the title.