Mentioned in a hatnote: This is a redirect from a title that is mentioned in a hatnote at the redirect target. The mention is usually atop the target article. It may, however, be directly under a section header, or in another article's hatnote (whenever the hatnote is under a section, {{R to section}} should also be used).
The titles of redirects mentioned in hatnotes may refer to a subject other than that of the target page. It is possible that this redirect may need to be retargeted, or become an article under its own title (see {{R with possibilities}}). If the title is a good candidate for a Wiktionary link, it may also be added.
From a Unicode character: This is a redirect from a single Unicode character to an article or Wikipedia project page that infers meaning for the symbol. Examples would be monetary symbols like dollar and euro signs, language symbols, emoji, and so on. For a multiple-character-long title with diacritics, use template {{R from diacritic}}instead. For codes such as "U+00E6", use {{R from Unicode code}}.