Correct Heading for Part II?
In the print version of my book I have Part II in the middle of an otherwise blank page, before the next set of chapters. I am unclear which heading to use for 'Part II'. It should be larger than the chapter headings (which are Heading 3), or the line that says Copyright 2018 (which is Heading 2). Can I use Heading 1, or is that reserved just for the title at the beginning of the book?