Tag replacement and multilevel tag

It would be useful to search and replace tags for better management of the tags; and multilevel tags such as #work/to_to# would also be beneficial to advanced users!

Welcome to the community, Yaping, and thanks for the suggestions!

Regarding tag renaming, the last section in this help center article should help: https://help.dynalist.io/article/135-tag-pane

Multilevel tag seems to be duplicate of an earlier feature request: Tag ontologies, you can Like that post to show your support it.