You can change the chapter numberings and heading levels from numbers to letters.
You can achieve this with the following guidance:
Author -> Page structure -> click on the three dots next to the chapter (chapters are marked as bold) -> Update chapter -> Advanced settings -> Choose chapter/ a heading level and click on the arrow to see the alternatives -> Select a letter and press Save
How to change chapters and heading levels from numbers to letters?
Jody Bright
Web Manuals Team