The answer is either view templates or you tag all the tiddlers you want to have the css and then use attribute selectors for the tag.
https://tiddlywiki.com/#Custom%20styles%20by%20data-tags In the long run I think you will find templates more useful https://tiddlywiki.com/#TemplateTiddlers I am not sure where a good tutorial for templates is, maybe someone else has a suggestion. -- You received this message because you are subscribed to the Google Groups "TiddlyWiki" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/tiddlywiki/b8277c66-7367-4f7b-908c-5797a612fa0b%40googlegroups.com.

