How to display a zero-level chapter (with figure) in the PDF outline?

[bowentan]

I followed the guide book for zero-chapter. But I found the chapter levels not expectedly listed in the outline of PDF viewer, which was like:

Is there any way to list the chapter level as the first level in PDF outline? Like the following:

|- I Chapter
|--- Chap Heading
|----- Sub Heading
|- II Chapter again
|--- Chap Heading
|--- Chap Heading
|----- Sub Heading
|------- Sub Sub Heading

according to the guide.

[flokl]

Hi @bowentan, there was just recently a showcase post about it here Part independent section. I personally use:

#let chapter(body) = heading(level: 1, body)

#set heading(
  offset: 1,
  numbering: (chap, ..nums) => {
  if nums.pos().len() == 0 {
    numbering("I", chap)
  } else {
    numbering("1.1", ..nums)
  }
})

#outline()


#chapter[Chapter One]
= Section One
== Subsection
#chapter[Chapter Two]
= Section One
== Subsection
= Section Two

Typst does currently not include the numbering in the PDF bookmarks, see #2416.

[Andrew]

You can post this variation in Part independent section, as closely related. Easier to find both under one topic. Some might prefer one or another.