Can’t see the line numbers - why?
The is an Option in Control Panel > Settings > CodeMirror > Enable line numbers
Presumably active but not visible? You did not actualy say that.
Have you tried it on a new wiki then if not a general fault start a debug process starting with trying to investigate plugin incompatibility?
Did you save the tiddler and re-open in edit mode. The cm editor has to be re-initialized after config options are changed.
Did you test it at: https://tiddlywiki.com/plugins/tiddlywiki/codemirror/ … It works there for me. If it does not work in your wiki there may be a problem with other plugins
I found the reason:
https://snowgoon88.github.io/TW5-extendedit/
Changing in $:/ControlPanel -> Advanced -> Editor Type -> text/vnd.tiddlywiki
fromcomptext
to codemirror
will show the line numbers.
Than some Stylesheet has to be done for good look and feel.