1. Select the File tab from the ribbon, then click Options at the bottom of the lefthand menu.
2. In the Options window, select Proofing, then click Custom Dictionaries.
3. In the Custom Dictionaries window, click New.
4. In the Create Custom Dictionary window, name your dictionary and save it to Word’s default folder or navigate through your files to save it in the folder containing the project. (As noted in the Mac instructions, if you ever need to reuse a custom dictionary you’ve saved in a project folder, open Custom Dictionaries and click Add. From there you’ll be able to navigate through your files to select the needed dictionary.)
5. After you’ve saved your new custom dictionary, you will be back at the Custom Dictionaries window. Make sure your new dictionary is checked and then click OK.
6. Make sure your new dictionary is selected in the list. Close the window.
7. Run the spell-checker on your style guide and add all unrecognized terms to your custom dictionary. Your dictionary is now ready to use on the full manuscript.