Description from extension meta
Adds the ability to change the line numbering style in Overleaf's Legacy editor to relative.
Image from store
Description from store
WARNING: This extension no longer works as of February 2023
Overleaf has now changed its editor to CodeMirror 6, which does not support the relative line numbering style.
Please make contact or contribute on GitHub if you have any insight into a fix for the new editor:
https://github.com/haakon8855/overleaf-relative-line-numbers