How can I emulate LaTeX `\part`s?

[quachpas]

I think this should fit your needs

Part independent section

You can simplify this by using numbering, counter, and spread operator: #set heading(numbering: (..nums) => { let chapter-count = counter("chapter counter") if nums.pos().len() == 1 { // Level 1: Roman numerals for Parts. numbering("I", ..nums) } else if nums.pos().len() == 2 { // Level 2: Use the chapter state counter and increment it. chapter-count.step() str(chapter-count.get().first() + 1) // or // context numbering("1", ..chapter-count.get()) } else { …