Hello @chris.davis,
Thanks for the valuable feedback.
For the moment, there is no such type of functionality built-in in Prismic. And I agree with you on how this feature can improve the user experience. I'll mark this post as a feature request for future improvements.
For the moment, you can use tabs to organize your content fields and make document editing more user-friendly. Find more detail in the article.
Let me know if you have any other doubt.
Thanks,
Priyanka