Working drafts
From Model Trademark Guidelines
If you are making major modifications, please "fork" the page you are editing by creating a new page with the old content and making your proposed changes on your newly-created page. (Sorry, I don't know any way to do it but create a new page then copy and paste from the "edit" page of the page you want to copy.) This way we can have both versions to refer to. Please also add your fork to the list below, with a brief parenthetical describing the reason for the fork.