This article provides a detailed guide on how to set the default file type when saving in Word. Just a few simple initial steps to apply to your entire document.
This article guides on Word 2013; for Word 2010, 2007, the steps are similar.
Step 1: Go to the File tab -> Options.

Step 2: Select the Save option.
Choose the default file type when saving in Word. For instance, in Word 2013, if you wish to default saving files as Word 2003, select Word 97-2003 Document (*.doc).

Finally, click OK to complete the default setting process when saving documents.
Wishing you all success!
