The following resources from Microsoft Support and other institutions may be useful in addressing common formatting issues in legal & scholarly writing:
In addition, the The Writing Center at Georgetown Law offers various Guides and Handouts on a variety of legal writing topics, including the following on formatting:
For further formatting support, refer to Microsoft Word Help & Learning.
You may want to consider submitting your seminar paper for publication. See the Law Library's guide on publishing articles in law reviews and journals for information on the process and resources.