If set to 1, omit technical memorandum headings and provide spaces appropriate for letterhead (see .AF macro).

Omit author information on first page (see .AU macro).

Flag indicating type of copy (original, draft, etc.).

Level of headings saved for table of contents (see .TC macro). Default is 2.

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.

If set to 1, use debug mode (mm continues even after encountering normally fatal errors). Default is 0.

If set to 1, eject page after each floating display. Default is 0.

Set format of floating displays (see .DF macro).

Set space used before and after static displays.

Font for Subject/Date/From. 0 (bold, the default) or 1 (roman).

Equation counter, incremented for each .EC macro.

Heading level for page eject before headings. Default is 0 and no eject.

If set to 1, place equation label at left margin. Default is 0.

Exhibit counter, incremented for each .EX macro.

Figure counter, incremented for each .FG macro.

Vertical spacing between footnotes.

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.

Level of heading for which break occurs before output of body text. Default is 2.

Level of heading for which centering occurs. Default is 0.

Type of indent after heading. Values are 0 (left-justified), 1 (indented, the default), 2 (indented except after .H, .LC, .DE).

Level of heading for which space after heading occurs. Default is 2.

Numbering type of heading: 1 (single) or 0 (concatenated, the default).

Set level of heading at which unnumbered headings occur. Default is 2.

If set to 1, enable hyphenation. Default is 0.

Set length of page. Default is 66v.

Flag to print list of equations after table of contents: 0 (don't print, the default) or 1 (print).

Like Le, but for list of figures.

Default indent of lists. Default is 6n for nroff and 5n for troff.

Set spacing between items in nested lists. Default is 6 (spacing between all levels of list).

Like Le, but for list of tables.

Like Le, but for list of exhibits.

Set page-numbering style:

Set numbering style for paragraphs: 0 (unnumbered, the default) or 1 (numbered).

Offset of page. For nroff, value is unscaled number representing character positions; default is 9 (.75i). For troff, value is scaled; default is .5i.

Set numbering style for pages in table of contents: 0 (lowercase roman, the default) or 1 (arabic).

Set separator for figure number in captions. 0 (use period, the default); 1 (use hyphen).

Current page number.

Amount of indent for paragraph. Default is 5n for nroff and 3n for troff.

Amount of spacing between paragraphs. Default is 3v.

Paragraph type. Values are 0 (left-justified, the default), 1 (indented), 2 (indented except after .H, .LC, .DE).

Suppress "PRIVATE" header by setting to 0 (default).

Reference counter, incremented for each .RS.

Default point size for troff. Default is 10. Vertical spacing is \nS+2.

Standard indent for displays. Default is 5n for nroff and 3n for troff.

Type of nroff output device. Sets registers for specific devices.

Table counter, incremented for each .TB.

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.

Width of page (line and title length). Default is 6i.