In the documentation for tags, section [Pretty tags](https://wiki.dendron.so/notes/8bc9b3f1-8508-4d3a-a2de-be9f12ef1821.html#pretty-tags), it says

[[#foo|tag.foo]] --> will render as #foo

however that does not work for me, the hash symbol is not rendered. It's no big deal for me as I don't think I want to do that anyway, but I thought I should point it out.