Number Special Sections

Sections that are assigned a built-in special style aren’t numbered by default. To number regular sections as well as special sections, set sectnums and assign it a value of all.

= Title
:sectnums: all

The assignment of appendix numbers isn’t affected by sectnums as their section title prefixes are controlled by the attribute appendix-caption. Book parts aren’t numbered by sectnums either, instead, they’re controlled by partnums.