13.3 Number Registers Used in mm

Table 13.1 lists mm's number registers. A dagger ( [dagger] ) next to a register name indicates that the register can be set only from the command line or before the mm macro definitions are read by the formatter. Any register having a single-character name can be set from the command line with the -r option.

Table 13.1: mm Number Registers
Register	Description
`A`	If set to 1, omit technical memorandum headings and provide spaces appropriate for letterhead (see .AF macro).
`Au`	Omit author information on first page (see .AU macro).
`C`	Flag indicating type of copy (original, draft, etc.).
`Cl`	Level of headings saved for table of contents (see .TC macro). Default is 2.
`Cp`	If set to 1 (default), list of figures and tables appear on same page as table of contents. Otherwise, they start on a new page.
`D`	If set to 1, use debug mode (mm continues even after encountering normally fatal errors). Default is 0.
`De`	If set to 1, eject page after each floating display. Default is 0.
`Df`	Set format of floating displays (see .DF macro).
`Ds`	Set space used before and after static displays.
`E`	Font for Subject/Date/From. 0 (bold, the default) or 1 (roman).
`Ec`	Equation counter, incremented for each `.EC` macro.
`Ej`	Heading level for page eject before headings. Default is 0 and no eject.
`Eq`	If set to 1, place equation label at left margin. Default is 0.
`Ex`	Exhibit counter, incremented for each `.EX` macro.
`Fg`	Figure counter, incremented for each `.FG` macro.
`Fs`	Vertical spacing between footnotes.
`H1 ... H7`	Heading counters for levels 1 to 7, incremented by `.H` macro of corresponding level or by `.HU` macro if at level given by register `Hu`. Registers `H2` to `H7` are reset to 0 by any `.H` (or `.HU`) macro at a lower-numbered level.
`Hb`	Level of heading for which break occurs before output of body text. Default is 2.
`Hc`	Level of heading for which centering occurs. Default is 0.
`Hi`	Type of indent after heading. Values are 0 (left-justified), 1 (indented, the default), 2 (indented except after `.H`, `.LC`, `.DE`).
`Hs`	Level of heading for which space after heading occurs. Default is 2.
`Ht`	Numbering type of heading: 1 (single) or 0 (concatenated, the default).
`Hu`	Set level of heading at which unnumbered headings occur. Default is 2.
`Hy`	If set to 1, enable hyphenation. Default is 0.
`L`	Set length of page. Default is 66v.
`Le`	Flag to print list of equations after table of contents: 0 (don't print, the default) or 1 (print).
`Lf`	Like `Le`, but for list of figures.
`Li`	Default indent of lists. Default is 6n for `nroff` and 5n for `troff`.
`Ls`	Set spacing between items in nested lists. Default is 6 (spacing between all levels of list).
`Lt`	Like `Le`, but for list of tables.
`Lx`	Like `Le`, but for list of exhibits.
`N`	Set page-numbering style:
	0	All pages get header (the default)
	1	Header printed as footer on page 1
	2	No header on page 1
	3	Section-page as footer
	4	No header unless `.PH` has been invoked
	5	Section-page and section-figure as footer
`Np`	Set numbering style for paragraphs: 0 (unnumbered, the default) or 1 (numbered).
`O`	Offset of page. For `nroff`, value is unscaled number representing character positions; default is 9 (.75i). For `troff`, value is scaled; default is .5i.
`Oc`	Set numbering style for pages in table of contents: 0 (lowercase roman, the default) or 1 (arabic).
`Of`	Set separator for figure number in captions. 0 (use period, the default); 1 (use hyphen).
`P`	Current page number.
`Pi`	Amount of indent for paragraph. Default is 5n for `nroff` and 3n for `troff`.
`Ps`	Amount of spacing between paragraphs. Default is 3v.
`Pt`	Paragraph type. Values are 0 (left-justified, the default), 1 (indented), 2 (indented except after `.H`, `.LC`, `.DE`).
`Pv`	Suppress "PRIVATE" header by setting to 0 (default).
`Rf`	Reference counter, incremented for each `.RS`.
`S`	Default point size for `troff`. Default is 10. Vertical spacing is `\nS+2`.
`Si`	Standard indent for displays. Default is 5n for `nroff` and 3n for `troff`.
`T`	Type of `nroff` output device. Sets registers for specific devices.
`Tb`	Table counter, incremented for each `.TB`.
`U`	Style of `nroff` underlining for `.H` and `.HU`. If not set, use continuous underline; if set, don't underline punctuation and whitespace. Default is 0.
`W`	Width of page (line and title length). Default is 6i.


13.2 Predefined String Names		13.4 Other Reserved Macro and String Names