Last Updated Apr 7, 2008 12:00 PM EDT
- Click File > Save As.
- Click the Tools button, then Security Options (or General Options if you're using Word 2007).
- Enter a password that will be required to open the document (or a password to modify it, if you want to make it a read-only document). Make sure it's a password you can remember! If you have a bad memory for that kind of thing, write the password down somewhere.
- Click OK and you're done!