If you are using Word for Mac 2011, make sure that the Maintain compatibility with Word 98-2004 check box is clear. On the Format pop-up menu, click Word Document (.docx). This is because other people may be unable to edit parts of a document that you create by using new or improved features in Word for Mac 2011 and Word 2016 for Mac. If you plan to share the document with people who use an earlier version of Word, you might want to work in compatibility mode and leave the document in its current file format.
Important: The following procedure changes the file format of the document.
