Here are some screenshots showing all of the options you will have if you choose a Custom theme for your book: Related ArticlesHow can I see what the different fonts look like, so I know which one to choose?Some language characters or symbols are not showing up correctly in my book, what can I do?What are the different features in the Free, Standard and Pro Author Memberships?What are the settings for each of the different Book Themes?In the Custom book Theme, Leanpub has a LOT of optional settings for making the formatting of parts, chapters and sections automatically consistent. Can you explain this in a bit more detail?