Microsoft introduced a new default file type with Office 2007 that changed the standard Word document type from .doc to .docx. It added some new features to the document and improved the types of edits that you could make. Unfortunately it also made it much harder to collaborate on documents with people that were still using earlier versions of Word. While they did release a compatibility pack that addressed this issue, not everyone was able to download it, or was even aware that it existed. But one way to ensure that users of the older versions of Word will still be able to read your documents is by learning how to save as .doc instead of .docx by default in Word 2010. This is a change that you can apply to the program that will automatically save your documents in the .doc format.
Save as .doc By Default in Word 2010
Like many of the other interesting settings that exist in Office 2010, this one is found on the Options menu that you can access from the File tab. And you are not only limited to .doc or .docx as the default file type, either. You can also choose to save to any of the other compatible Word 2010 file types as well, such as .txt or .html. But continue reading to learn how to start using .doc as your default file type in Word 2010.
Step 1: Launch Microsoft Word 2010.
Step 2: Click the File tab at the top-left corner of the window.
Step 3: Click the Options item at the bottom of the column on the left side of the window.
Step 4: Click Save in the column on the left side of the Word Options window.
Step 5: Click the drop-down menu to the right of Save files in this format, then choose Word 97-2003 Document (*.doc).
Step 6: Click the OK button at the bottom of the window to apply your changes.