I just completed a decent-sized translation project (Spanish - English) using OnlyOffice Desktop editors and I’m impressed with the quality and speed of the application - congratulations, job well-done.
The only feature I could not find and really missed was the ability to have the Table of Contents section with roman numeral page numbers. I’ve searched the help documentation and forums with no luck and therefore I conclude - perhaps incorrectly - that this is not possible.
Therefore this posting, which might be a how-to-question or a feature request.
In case it matters, I am running OnlyOffice 18.104.22.168 on Ubuntu 21.10. I installed this by updating the apt repository with the line
deb https://download.onlyoffice.com/repo/debian squeeze main
Thanks very much again for such a fine product!