In Microsoft Office 2007 they introduced the Office Button, it was removed in Office 2010. If you are upgrading from Microsoft Office 2007 you might find this confusing.
When software companies such as Microsoft come out with new versions of popular software I find it is the subtle little changes that can create the most problems. If you have been used to working with Microsoft Office button this tutorial will show you how it impacts you when you upgrade to either Office 2010 or ghostly 2013. Enjoy.