Confusing docs about multi fields title

This docs is confusing https://docs.erpnext.com/docs/v13/user/manual/en/customize-erpnext/articles/document-title-with-multiple-fields

The explanation and first image shows the fields are in the Default box.
But the second image shows the fields are in Options field.
None works.
And actually what works is the fields should be in the Fetch from box.

Can anyone validate my finding?
Thank you

The documentation website is now a wiki. Feel free to edit and clarify!

Thanks @peterg,
It’s not just about editing. I need others to also validate before changing it.