Hi Airtas,

The benefit to saving a document as a lower version is that you can open it from a computer that has the less updated version of the program. You can always go back and save it as a .docx, although if you haven't used any of the more advanced features of 2007, it probably won't make much of a difference in how your document looks. How you save the document doesn't "enable" the features because the features available to you depend on what version of Word you are working in. Does this make sense?

Isabella
MSFT Office Outreach Team