By default, Word documents edited using Word2010 are saved as Word2010 documents in docx format. If Word2010 users often need to exchange Word documents with Word2003 users, and Word2003 users cannot open docx documents directly without installing file format compatibility Packs, Word2010 users can set their default save format to doc files.
The steps for setting the default save format to Doc file in Word2010 are as follows: Step 1th, open the Word2010 document window, and click the file → options button, as shown in Figure 1.
Figure 1 Click the "Options" button step 2nd, switch to the Save tab in the Open Word Options dialog box, click the "Save file as this format" Drop-down button in the Save document area, select the word97-2003 document (*.doc) option in the Open Drop-down menu, and click OK button, as shown in Figure 2.
Figure 2 Select the word97-2003 document (*.doc) Option tip: Change the Word2010 default saved file format, and you can't change the formatting of a new Word document using the right-click menu, and the new Word document with the right-click menu is still. docx format. You can save the doc file by default only when you open the Word2010 document window and then save it.