## 13.2. Predefined String Names

`BU` | Bullet; same as `\(bu`.
`Ci` | List of indents for table-of-contents levels.
`DT` | Current date, unless overridden. Month, day, year (e.g., January 1, 2000).
`EM` | Em dash string (em dash in `troff` and a double hyphen in `nroff`).
`F` | Footnote number generator.
`HF` | Fonts used for each level of heading (1 = roman, 2 = italic, 3 = bold).
`HP` | Point size used for each level of heading.
`Le` | Title set for “LIST OF EQUATIONS.”
`Lf` | Title set for “LIST OF FIGURES.”
`Lt` | Title set for “LIST OF TABLES.”
`Lx` | Title set for “LIST OF EXHIBITS.”
`RE` | SCCS release and level of mm.
`Rf` | Reference number generator.
`Rp` | Title for “REFERENCES.”
`Tm` | Trademark string. Places the letters “TM” in a smaller point size, one-half line above the text it follows.

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