Currently, this won't have effect because sections are not numbered
````markdown
---
titre : "Sans titre"
format:
  html:
    number-offset: [5]
---

# Quarto

Quarto enables you to weave together content and executable code into a finished document. To learn more about Quarto see <https://quarto.org>.
````

`number-sections` needs to be set explicitly 
````markdown
---
titre : "Sans titre"
format:
  html:
    number-sections: true
    number-offset: [5]
---

# Quarto

Quarto enables you to weave together content and executable code into a finished document. To learn more about Quarto see <https://quarto.org>.
````

It seems like it was the case in the past when it was implemented: https://github.com/quarto-dev/quarto-cli/commit/7e963f54996ec090271db57395bd230849d76e66 but doesn't seems to be the case anymore.

Was it removed on purpose or lost in refactoring ? 


2022-03-14T09:07:02Z
cderv
closed
number-offset implies number-sections, maybe the later when former is set ? 
https://github.com/quarto-dev/quarto-cli/issues/417