# Parts
You can add parts to organize one or more book chapters together. Parts can be inserted at the top of an .Rmd file, before the first-level chapter heading in that same file.
Add a numbered part: `# (PART) Act one {-}` (followed by `# A chapter`)
Add an unnumbered part: `# (PART\*) Act one {-}` (followed by `# A chapter`)
Add an appendix as a special kind of un-numbered part: `# (APPENDIX) Other stuff {-}` (followed by `# A chapter`). Chapters in an appendix are prepended with letters instead of numbers.
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