Just have another beginner's question. Is there any place to describe the detailed configurable items for config.toml and backend.toml. I feel most questions could be solved by these two config files. But I can only find some of the configurable items by just reading the answers to questions which is not an efficient way.

Hmm doesn’t seem like there is a single place where config.toml is documented (open issue for it here https://github.com/PrefectHQ/prefect/issues/2562) but you can see the full list here https://github.com/PrefectHQ/prefect/blob/master/src/prefect/config.toml As for backend.toml there isn’t much to detail there, it contains a single entry for API toggling

backend = "server OR cloud"

Yeah, this is useful. the Config.toml template or its link should be placed in the document for readers to understand. However it's good to see it and it's clear enough. Thanks!