Provided by: groff_1.21-6_i386 bug

NAME

       groff_mm - groff mm macros

SYNOPSIS

       groff -mm [ options... ] [ files... ]

DESCRIPTION

       The  groff  mm  macros  are  intended  to be compatible with the DWB mm
       macros with the following limitations:

       +o      No Bell Labs localisms are implemented.

       +o      The macros OK and PM are not implemented.

       +o      groff mm does not support cut marks.

       mm is intended to support easy localization.  Use mmse  as  an  example
       how  to  adapt  the  output  format  to a national standard.  Localized
       strings are collected in the file `/usr/share/groff/1.21/tmac/xx.tmac',
       where  xx  denotes  the two-letter code for the language, as defined in
       the ISO 639 standard.  For Swedish, this is `sv.tmac' - not `se', which
       is the ISO 3166 two-letter code for the country (as used for the output
       format localization).

       A file called locale or country_locale is read after the initialization
       of  the  global  variables.   It  is therefore possible to localize the
       macros with a different company name and so on.

       In this manual, square brackets are used to show optional arguments.

   Number registers and strings
       Many macros can be controlled  by  number  registers  and  strings.   A
       number register is assigned with the nr command:

              .nr XXX [+-]n [i]

       XXX  is  the  name  of the register, n is the value to be assigned, and
       i is the increment value for auto-increment.  n  can  have  a  plus  or
       minus  sign  as  a  prefix  if an increment or decrement of the current
       value is wanted.   (Auto-increment  or  auto-decrement  occurs  if  the
       number  register  is  used  with  a  plus  or  minus  sign, \n+[XXX] or
       \n-[XXX].)

       Strings are defined with ds.

              .ds YYY string

       The string is assigned everything to the end of the line, even  blanks.
       Initial  blanks  in  string  should  be  prefixed  with a double-quote.
       (Strings are used in the text as \*[YYY].)

   Special formatting of number registers
       A number register is printed with normal digits if no format  has  been
       given.  Set the format with af:

              .af R c

       R is the name of the register, c is the format.

              Form   Sequence
              1      0, 1, 2, 3, ...

              001    000, 001, 002, 003, ...
              i      0, i, ii, iii, iv, ...
              I      0, I, II, III, IV, ...
              a      0, a, b, c, ..., z, aa, ab, ...
              A      0, A, B, C, ..., Z, AA, AB, ...

   Fonts
       In  mm,  the fonts (or rather, font styles) R (normal), I (italic), and
       B (bold) are hardwired to font positions 1,  2,  and  3,  respectively.
       Internally,  font positions are used for backwards compatibility.  From
       a practical point of  view  it  doesn't  make  a  big  difference  -  a
       different  font  family  can  still be selected with a call to the .fam
       request or using groff's -f command line option.  On the other hand, if
       you  want to replace just, say, font B, you have to replace the font at
       position 2 (with a call to `.fp 2 ...').

   Macros
       )E level text
              Add heading text text to the table of contents with level, which
              is either 0 or in the range 1 to 7.  See also .H.  This macro is
              used for customized tables of contents.

       1C [1] Begin one-column processing.  A 1 as an  argument  disables  the
              page   break.   Use  wide  footnotes,  small  footnotes  may  be
              overprinted.

       2C     Begin two-column processing.  Splits the page  in  two  columns.
              It is a special case of MC.  See also 1C.

       AE     Abstract end, see AS.

       AF [name-of-firm]
              Author's firm, should be called before AU, see also COVER.

       AL [type [text-indent [1]]]
              Start  auto-increment  list.   Items are numbered beginning with
              one.  The type argument controls the format of numbers.

                     Arg   Description
                     1     Arabic (the default)
                     A     Upper-case letters (A-Z)
                     a     Lower-case letters (a-z)
                     I     Upper-case roman
                     i     Lower-case roman

              text-indent sets the indentation  and  overrides  Li.   A  third
              argument prohibits printing of a blank line before each item.

       APP name text
              Begin  an  appendix  with name name.  Automatic naming occurs if
              name is "".  The appendices start with A if automatic naming  is
              used.   A  new page is ejected, and a header is also produced if
              the number variable Aph is non-zero.  This is the default.   The
              appendix  always  appears in the `List of contents' with correct
              page numbers.  The name `APPENDIX' can be changed by setting the
              string  App to the desired text.  The string Apptxt contains the
              current appendix text.

       APPSK name pages text
              Same as .APP, but the page number  is  incremented  with  pages.
              This  is used when diagrams or other non-formatted documents are
              included as appendices.

       AS [arg [indent]]
              Abstract start.  Indentation is specified in `ens', but  scaling
              is  allowed.   Argument  arg  controls  where  the  abstract  is
              printed.

              Arg   Placement
              0     Abstract is printed on page 1 and on the  cover  sheet  if
                    used  in  the released-paper style (MT 4), otherwise it is
                    printed on page 1 without a cover sheet.
              1     Abstract is only printed on the cover sheet (MT 4 only).
              2     Abstract is printed only on the cover sheet (other than MT
                    4  only).   The  cover sheet is printed without a need for
                    CS.

              An abstract is not printed at all in external  letters  (MT  5).
              The  indent  parameter controls the indentation of both margins,
              otherwise normal text indentation is used.

       AST [title]
              Abstract title.  Default is `ABSTRACT'.  Sets the text above the
              abstract text.

       AT title1 [title2 [...]]
              Author's  title.   AT must appear just after each AU.  The title
              shows up after the name in the signature block.

       AU [name [initials [loc [dept [ext [room [arg [arg [arg]]]]]]]]]
              Author information.  Specifies the author of the memo or  paper,
              and  is  printed on the cover sheet and on other similar places.
              AU must not  appear  before  TL.   The  author  information  can
              contain  initials,  location,  department,  telephone extension,
              room number or name and up to three extra arguments.

       AV [name [1]]
              Approval signature.  Generates an approval line with  place  for
              signature  and date.  The string `APPROVED:' can be changed with
              variable Letapp; it is replaced with an empty lin if there is  a
              second argument.  The string `Date' can be changed with variable
              Letdate.

       AVL [name]
              Letter signature.  Generates a line with place for signature.

       B [bold-text [prev-font-text [bold [...]]]]
              Begin boldface.  No limit  on  the  number  of  arguments.   All
              arguments  are concatenated to one word; the first, third and so
              on is printed in boldface.

       B1     Begin box (as the ms macro).  Draws a box around the text.   The
              text  is  indented  one  character,  and the right margin is one
              character shorter.

       B2     End box.  Finishes the box started with B1.

       BE     End bottom block, see BS.

       BI [bold-text [italic-text [bold-text [...]]]]
              Bold-italic.  No limit on the number of arguments, see B.

       BL [text-indent [1]]
              Start bullet list.  Initializes a list with a bullet and a space
              in  the  beginning  of  each  list  item  (see LI).  text-indent
              overrides the default indentation  of  the  list  items  set  by
              number  register  Pi.   A third argument prohibits printing of a
              blank line before each item.

       BR [bold-text [roman-text [bold-text [...]]]]
              Bold-roman.  No limit on the number of arguments.

       BS     Bottom block start.  Begins the definition of a text block which
              is printed at the bottom of each page.  The block ends with BE.

       BVL text-indent [mark-indent [1]]
              Start  of  broken variable-item list.  Broken variable-item list
              has no fixed mark, it assumes that every LI has a mark  instead.
              The  text  always begins at the next line after the mark.  text-
              indent sets the indentation to the  text,  and  mark-indent  the
              distance  from  the  current  indentation  to the mark.  A third
              argument prohibits printing of a blank line before each item.

       COVER [arg]
              Begin a coversheet definition.   It  is  important  that  .COVER
              appears  before  any  normal text.  This macro uses arg to build
              the filename `/usr/share/groff/1.21/tmac/mm/arg.cov'.  Therefore
              it  is  possible  to  create  unlimited  types  of cover sheets.
              `ms.cov' is supposed to look like the ms  cover  sheet.   .COVER
              requires  a  .COVEND at the end of the cover definition.  Always
              use this order of the cover macros:

                     .COVER
                     .TL
                     .AF
                     .AU
                     .AT
                     .AS
                     .AE
                     .COVEND

              However, only .TL and .AU are required.

       COVEND Finish the cover description and print the cover  page.   It  is
              defined in the cover file.

       DE     Display  end.   Ends a block of text or display that begins with
              DS or DF.

       DF [format [fill [rindent]]]
              Begin floating display (no nesting allowed).  A floating display
              is  saved  in  a  queue  and  is  printed  in the order entered.
              Format, fill, and rindent are  the  same  as  in  DS.   Floating
              displays are controlled by the two number registers De and Df.

              De register

                     0   Nothing special, this is the default.
                     1   A  page  eject  occurs  after  each  printed display,
                         giving  only  one  display  per  page  and  no   text
                         following it.

              Df register

                     0   Displays are printed at the end of each section (when
                         section-page numbering is active) or at  the  end  of
                         the document.
                     1   A new display is printed on the current page if there
                         is enough space, otherwise it is printed at  the  end
                         of the document.
                     2   One  display  is  printed  at the top of each page or
                         column (in multi-column mode).
                     3   Print one display if there is enough  space  for  it,
                         otherwise  it  is printed at the top of the next page
                         or column.

                     4   Print as many displays as possible in a new  page  or
                         column.   A page break occurs between each display if
                         De is not zero.
                     5   Fill the current page  with  displays  and  the  rest
                         beginning  at  a  new  page  or column.  (This is the
                         default.)  A page break occurs between  each  display
                         if De is not zero.

       DL [text-indent [1 [1]]]
              Dash list start.  Begins a list where each item is printed after
              a dash.  text-indent changes the default indentation of the list
              items  set by number register Pi.  A second argument prevents an
              empty line between each list item.  See LI.   A  third  argument
              prohibits printing of a blank line before each item.

       DS [format [fill [rindent]]]
              Static  display start.  Begins collection of text until DE.  The
              text is printed together on the same page, unless it  is  longer
              than the height of the page.  DS can be nested arbitrarily.

              format

                     ""     No indentation.
                     none   No indentation.
                     L      No indentation.
                     I      Indent text with the value of number register Si.
                     C      Center each line.
                     CB     Center the whole display as a block.
                     R      Right-adjust the lines.
                     RB     Right-adjust the whole display as a block.

              The values `L', `I', `C', and `CB' can also be specified as `0',
              `1', `2', and `3', respectively, for compatibility reasons.

              fill

                     ""     Line-filling turned off.
                     none   Line-filling turned off.
                     N      Line-filling turned off.
                     F      Line-filling turned on.

              `N' and `F' can also be specified as `0' and `1', respectively.

              By default, an empty  line  is  printed  before  and  after  the
              display.   Setting  number  register  Ds  to  0  prevents  this.
              rindent shortens the line length by that amount.

       EC [title [override [flag [refname]]]]
              Equation title.  Sets a title for  an  equation.   The  override
              argument changes the numbering.

              flag

                     none   override is a prefix to the number.
                     0      override is a prefix to the number.
                     1      override is a suffix to the number.
                     2      override replaces the number.

              EC  uses the number register Ec as a counter.  It is possible to
              use .af to change the format of the number.  If number  register
              Of  is 1, the format of title uses a dash instead of a dot after
              the number.

              The string Le controls the  title  of  the  List  of  Equations;
              default  is  `LIST OF EQUATIONS'.  The List of Equations is only
              printed if number register Le is 1.   The  default  is  0.   The
              string  Liec  contains  the  word  `Equation',  which is printed
              before the number.  If refname is used, then the equation number
              is saved with .SETR, and can be retrieved with `.GETST refname'.

              Special handling of the title occurs if EC is used inside DS/DE;
              it is not affected by the format of DS.

       EF [arg]
              Even-page footer, printed just above the normal page  footer  on
              even pages.  See PF.

              This macro defines string EOPef.

       EH [arg]
              Even-page  header,  printed just below the normal page header on
              even pages.  See PH.

              This macro defines string TPeh.

       EN     Equation end, see EQ.

       EOP    End-of-page user-defined macro.  This macro is called instead of
              the  normal  printing of the footer.  The macro is executed in a
              separate environment, without any trap active.  See TP.

              strings available to EOP

              EOPf    argument of PF
              EOPef   argument of EF
              EOPof   argument of OF

       EPIC [-L] width height [name]
              Draw a box with the given width and height.  It also prints  the
              text name or a default string if name is not specified.  This is
              used to include external pictures; just give  the  size  of  the
              picture.  -L left-adjusts the picture; the default is to center.
              See PIC.

       EQ [label]
              Equation start.  EQ/EN are the delimiters for equations  written
              for  eqn(1).  EQ/EN must be inside of a DS/DE pair, except if EQ
              is used to set options for eqn only.  The label argument appears
              at  the right margin of the equation, centered vertically within
              the DS/DE block, unless number register Eq is 1.  Then the label
              appears at the left margin.

              If  there  are multiple EQ/EN blocks within a single DS/DE pair,
              only the last equation label (if any) is printed.

       EX [title [override [flag [refname]]]]
              Exhibit title.  The arguments are the same as for EC.   EX  uses
              the number register Ex as a counter.  The string Lx controls the
              title of the List of Exhibits; default is  `LIST  OF  EXHIBITS'.
              The List of Exhibits is only printed if number register Lx is 1,
              which is  the  default.   The  string  Liex  contains  the  word
              `Exhibit',  which  is  printed before the number.  If refname is
              used, the exhibit  number  is  saved  with  .SETR,  and  can  be
              retrieved with `.GETST refname'.

              Special handling of the title occurs if EX is used inside DS/DE;
              it is not affected by the format of DS.

       FC [closing]
              Print `Yours very truly,' as a formal closing  of  a  letter  or
              memorandum.   The  argument  replaces  the  default string.  The
              default is stored in string variable Letfc.

       FD [arg [1]]
              Footnote default format.   Controls  the  hyphenation  (hyphen),
              right margin justification (adjust), and indentation of footnote
              text (indent).  It  can  also  change  the  label  justification
              (ljust).

                     arg   hyphen   adjust   indent   ljust
                     0     no       yes      yes      left
                     1     yes      yes      yes      left
                     2     no       no       yes      left
                     3     yes      no       yes      left
                     4     no       yes      no       left
                     5     yes      yes      no       left
                     6     no       no       no       left
                     7     yes      no       no       left
                     8     no       yes      yes      right
                     9     yes      yes      yes      right
                     10    no       no       yes      right
                     11    yes      no       yes      right

              An  argument  greater  than  or  equal  to  11  is considered as
              value 0.  Default for mm is 10.

       FE     Footnote end.

       FG [title [override [flag [refname]]]]
              Figure title.  The arguments are the same as for  EC.   FG  uses
              the number register Fg as a counter.  The string Lf controls the
              title of the List of Figures; default is `LIST OF FIGURES'.  The
              List  of  Figures  is  only  printed if number register Lf is 1,
              which is  the  default.   The  string  Lifg  contains  the  word
              `Figure',  which  is  printed  before the number.  If refname is
              used, then the figure number is saved with  .SETR,  and  can  be
              retrieved with `.GETST refname'.

              Special handling of the title occurs if FG is used inside DS/DE,
              it is not affected by the format of DS.

       FS [label]
              Footnote start.  The footnote  is  ended  by  FE.   By  default,
              footnotes are automatically numbered; the number is available in
              string F.  Just add \*F in the text.  By  adding  label,  it  is
              possible  to  have  other  number  or  names  on  the footnotes.
              Footnotes in displays are now possible.  An empty line separates
              footnotes;  the  height  of  the  line  is  controlled by number
              register Fs, default value is 1.

       GETHN refname [varname]
              Include the header number where the corresponding `SETR refname'
              was  placed.   This  is  displayed  as  `X.X.X.' in pass 1.  See
              INITR.  If varname is  used,  GETHN  sets  the  string  variable
              varname to the header number.

       GETPN refname [varname]
              Include  the  page number where the corresponding `SETR refname'
              was placed.  This is displayed as `9999' in pass 1.  See  INITR.
              If varname is used, GETPN sets the stringvariable varname to the
              page number.

       GETR refname
              Combine GETHN and GETPN with the text `chapter'  and  `,  page'.
              The string Qrf contains the text for the reference:

                     .ds Qrf See chapter \\*[Qrfh], page \\*[Qrfp].

              Qrf may be changed to support other languages.  Strings Qrfh and
              Qrfp are set by GETR and contain the  page  and  header  number,
              respectively.

       GETST refname [varname]
              Include  the  string  saved  with  the second argument to .SETR.
              This is a dummy string in pass 1.  If  varname  is  used,  GETST
              sets it to the saved string.  See INITR.

       H level [heading-text [heading-suffix]]
              Numbered  section  heading.   Section  headers  can have a level
              between 1 and 14; level 1 is the top level.  The text  is  given
              in  heading-text,  and must be surrounded by double quotes if it
              contains spaces.  heading-suffix is added to the header  in  the
              text  but  not  in the table of contents.  This is normally used
              for footnote  marks  and  similar  things.   Don't  use  \*F  in
              heading-suffix,  it  doesn't work.  A manual label must be used,
              see FS.

              A call to the paragraph macro P directly  after  H  is  ignored.
              H takes care of spacing and indentation.

              Page ejection before heading

                     Number  register  Ej  controls  page  ejection before the
                     heading.  By default, a level-one heading gets two  blank
                     lines  before it; higher levels only get one.  A new page
                     is ejected before  each  first-level  heading  if  number
                     register Ej is 1.  All levels below or equal the value of
                     Ej get a new page.  Default value for Ej is 0.

              Heading break level

                     A line break occurs after  the  heading  if  the  heading
                     level  is  less  or equal to number register Hb.  Default
                     value is 2.

              Heading space level

                     A blank line is inserted after the heading if the heading
                     level  is  less  or equal to number register Hs.  Default
                     value is 2.

                     Text follows the heading on the same line if the level is
                     greater than both Hb and Hs.

              Post-heading indent

                     Indentation  of  the text after the heading is controlled
                     by number register Hi.  Default value is 0.

                     Hi

                     0   The text is left-justified.
                     1   Indentation of the text follows the value  of  number
                         register Pt , see P.
                     2   The  text  is  lined  up  with  the first word of the
                         heading.

              Centered section headings

                     All  headings  whose  level  is  equal  or  below  number
                     register  Hc  and also less than or equal to Hb or Hs are
                     centerered.

              Font control of the heading

                     The font of each heading level is  controlled  by  string
                     HF.   It  contains  a  font  number or font name for each
                     level.  Default value is

                            2 2 2 2 2 2 2 2 2 2 2 2 2 2

                     (all headings in italic).  This could also be written as

                            I I I I I I I I I I I I I I

                     Note that some other implementations use 3 3 2 2 2 2 2 as
                     the  default  value.   All omitted values are presumed to
                     have value 1.

              Point size control

                     String HP controls the point size of each heading, in the
                     same  way  as HF controls the font.  A value of 0 selects
                     the default point size.  Default value is

                            0 0 0 0 0 0 0 0 0 0 0 0 0 0

                     Beware that only the point size changes, not the vertical
                     size.  The latter can be controlled by the user-specified
                     macros HX and/or HZ.

              Heading counters

                     Fourteen number registers named H1 up to H14 contain  the
                     counter  for  each heading level.  The values are printed
                     using arabic numerals; this can be changed with the macro
                     HM  (see  below).   All  marks  are  concatenated  before
                     printing.  To avoid this, set number register  Ht  to  1.
                     This  only  prints  the  current  heading counter at each
                     heading.

              Automatic table of contents

                     All  headings  whose  level  is  equal  or  below  number
                     register  Cl  are  saved  to  be  printed in the table of
                     contents.  Default value is 2.

              Special control of the heading, user-defined macros

                     The following macros can be defined by the user to get  a
                     finer  control  of  vertical  spacing,  fonts,  or  other
                     features.  Argument level is  the  level-argument  to  H,
                     but  0 for unnumbered headings (see HU).  Argument rlevel
                     is the real level; it is set to number  register  Hu  for
                     unnumbered  headings.   Argument heading-text is the text
                     argument to H and HU.

                     HX level rlevel heading-text
                            This macro is called just before the  printing  of
                            the   heading.    The   following   registers  are
                            available for HX.  Note that HX may alter }0,  }2,
                            and ;3.

                            }0 (string)
                                   Contains  the  heading mark plus two spaces
                                   if rlevel is non-zero, otherwise empty.

                            ;0 (register)
                                   Contains the position of the text after the
                                   heading.   0  means  that  the  text should
                                   follow  the  heading  on  the  same   line,
                                   1  means  that  a  line  break should occur
                                   before the text, and 2 means that  a  blank
                                   line  should  separate  the heading and the
                                   text.

                            }2 (string)
                                   Contains two spaces if register  ;0  is  0.
                                   It is used to separate the heading from the
                                   text.  The string is empty if  ;0  is  non-
                                   zero.

                            ;3 (register)
                                   Contains  the  needed  space in units after
                                   the heading.  Default is 2v.  Can  be  used
                                   to   change  things  like  numbering  (}0),
                                   vertical spacing (}2), and the needed space
                                   after the heading.

                     HY dlevel rlevel heading-text
                            This   macro   is   called  after  size  and  font
                            calculations  and  might   be   used   to   change
                            indentation.

                     HZ dlevel rlevel heading-text
                            This  macro  is  called  after the printing of the
                            heading, just before H or HU exits.  Can  be  used
                            to change the page header according to the section
                            heading.

       HC [hyphenation-character]
              Set hyphenation character.  Default value is  `\%'.   Resets  to
              the  default  if  called  without  argument.  Hyphenation can be
              turned off by setting number register Hy to 0 at  the  beginning
              of the file.

       HM [arg1 [arg2 [... [arg14]]]]
              Heading  mark  style.  Controls the type of marking for printing
              of the heading counters.  Default is 1 for all levels.

              Argument

              1      Arabic numerals.
              0001   Arabic numerals with leading zeroes, one or more.
              A      upper-case alphabetic
              a      lower-case alphabetic
              I      upper-case roman numerals
              i      lower-case roman numerals
              ""     Arabic numerals.

       HU heading-text
              Unnumbered section header.  HU behaves like H at  the  level  in
              number register Hu.  See H.

       HX dlevel rlevel heading-text
              User-defined  heading  exit.   Called  just  before printing the
              header.  See H.

       HY dlevel rlevel heading-text
              User-defined heading exit.   Called  just  before  printing  the
              header.  See H.

       HZ dlevel rlevel heading-text
              User-defined  heading  exit.   Called  just  after  printing the
              header.  See H.

       I [italic-text [prev-font-text [italic-text [...]]]]
              Italic.  Changes the font to italic if called without arguments.
              With  one  argument  it  sets  the  word  in  italic.   With two
              arguments it concatenates them and sets the first word in italic
              and  the  second in the previous font.  There is no limit on the
              number of argument; all are concatenated.

       IA [addressee-name [title]]
              Begin specification of the addressee and addressee's address  in
              letter  style.  Several names can be specified with empty IA/IE-
              pairs, but only one address.  See LT.

       IB [italic-text [bold-text [italic-text [...]]]]
              Italic-bold.  Even arguments  are  printed  in  italic,  odd  in
              boldface.  See I.

       IE     End the address specification after IA.

       INITI type filename [macro]
              Initialize  the new index system and set the filename to collect
              index lines in with IND.  Argument  type  selects  the  type  of
              index:  page  number, header marks or both.  The default is page
              numbers.

              It is also possible to create a macro that  is  responsible  for
              formatting  each  row; just add the name of the macro as a third
              argument.   The  macro  is  then  called  with  the   index   as
              argument(s).

              type

              N   Page numbers
              H   Header marks
              B   Both  page  numbers  and  header marks, separated with a tab
                  character.

       INITR filename
              Initialize the refence macros.  References are written to stderr
              and  are supposed to be written to `filename.qrf'.  Requires two
              passes with groff; this is handled by a separate program  called
              mmroff(1).   This  program  exists  because  groff(1) by default
              deactivates the unsafe operations that are  required  by  INITR.
              The first pass looks for references, and the second one includes
              them.  INITR can be used several times, but it is only the first
              occurrence of INITR that is active.

              See also SETR, GETPN, and GETHN.

       IND arg1 [arg2 [...]]
              Write  a  line  in  the  index  file  selected by INITI with all
              arguments and the page number or header mark separated by tabs.

                     Examples

                     arg1\tpage number
                     arg1\targ2\tpage number
                     arg1\theader mark
                     arg1\tpage number\theader mark

       INDP   Print the index by  running  the  command  specified  by  string
              variable  Indcmd,  which  has  `sort -t\t' as the default value.
              INDP reads the output from the command to  form  the  index,  by
              default  in two columns (this can be changed by defining TYIND).
              The index is printed  with  string  variable  Index  as  header,
              default  is `INDEX'.  One-column processing is reactivated after
              the list.  INDP calls the user-defined macros TXIND, TYIND,  and
              TZIND  if  defined.   TXIND is called before printing the string
              `INDEX', TYIND is called instead of printing `INDEX', and  TZIND
              is  called  after the printing and should take care of restoring
              to normal operation again.

       ISODATE [0]
              Change the predefined date string in DT to ISO-format, this  is,
              `YYYY-MM-DD'.   This  can  also be done by adding -rIso=1 on the
              command line.  Reverts to old date format if argument is 0.

       IR [italic-text [roman-text [italic-text [...]]]]
              Italic-roman.  Even arguments are  printed  in  italic,  odd  in
              roman.  See I.

       LB text-indent mark-indent pad type [mark [LI-space [LB-space]]]
              List-begin  macro.  This is the common macro used for all lists.
              text-indent is the number of spaces to indent the text from  the
              current indentation.

              pad  and mark-indent control where to put the mark.  The mark is
              placed within the mark area, and mark-indent sets the number  of
              spaces  before  this  area.   By default it is 0.  The mark area
              ends where the text begins.  The start  of  the  text  is  still
              controlled by text-indent.

              The mark is left-justified whitin the mark area if pad is 0.  If
              pad is greater than 0, mark-indent is ignored, and the  mark  is
              placed  pad  spaces  before  the text.  This right-justifies the
              mark.

              If type is 0 the list either has a hanging  indentation  or,  if
              argument mark is given, the string mark as a mark.

              If  type  is  greater  than  0 automatic numbering occurs, using
              arabic numbers if mark is empty.  mark can then be any  of  `1',
              `A', `a', `I', or `i'.

              type selects one of six possible ways to display the mark.

              type

                     1   x.
                     2   x)
                     3   (x)
                     4   [x]
                     5   <x>
                     6   {x}

              Every  item  in  the  list  gets  LI-space number of blank lines
              before them.  Default is 1.

              LB itself prints LB-space blank lines.  Default is 0.

       LC [list-level]
              List-status clear.  Terminates all current active lists down  to
              list-level,  or 0 if no argmuent is given.  This is used by H to
              clear any active list.

       LE [1] List end.  Terminates the current list.  LE outputs a blank line
              if an argument is given.

       LI [mark [1|2]]
              List  item preceding every item in a list.  Without argument, LI
              prints the mark determined by the current list type.  By  giving
              LI  one  argument,  it  uses  that  as  the  mark  instead.  Two
              arguments to LI makes mark a prefix to the current mark.   There
              is  no  separating  space between the prefix and the mark if the
              second argument is `2' instead of `1'.  This behaviour can  also
              be  achieved  by  setting number register Limsp to zero.  A zero
              length mark makes a hanging indentation instead.

              A blank line is printed before the list item by  default.   This
              behaviour  can be controlled by number register Ls.  Pre-spacing
              occurs for each list level less than or equal  to  Ls.   Default
              value is 99.  There is no nesting limit.

              The  indentation  can  be  changed  through  number register Li.
              Default is 6.

              All lists begin with a list  initialization  macro,  LB.   There
              are,  however,  seven predefined list types to make lists easier
              to use.  They all call LB with different default values.

                     AL    Automatically Incremented List
                     ML    Marked List
                     VL    Variable-Item List
                     BL    Bullet List
                     DL    Dash List
                     RL    Reference List
                     BVL   Broken Variable List.

              These lists are described at other places in this  manual.   See
              also LB.

       LT [arg]
              Format a letter in one of four different styles depending on the
              argument.  See also section INTERNALS.

                     Arg   Style
                     BL    Blocked.   Date  line,  return  address,   writer's
                           address  and  closing  begins  at the center of the
                           line.  All other lines begin at the left margin.
                     SB    Semi-blocked.  Same as  blocked,  except  that  the
                           first  line  in  every  paragraph  is indented five
                           spaces.
                     FB    Full-blocked.  All lines begin at the left margin.
                     SP    Simplified.  Almost the same  as  the  full-blocked
                           style.  Subject and the writer's identification are
                           printed in all-capital.

       LO type [arg]
              Specify options in letter (see .LT).  This  is  a  list  of  the
              standard options:

                     CN   Confidential notation.  Prints `CONFIDENTIAL' on the
                          second line  below  the  date  line.   Any  argument
                          replaces  `CONFIDENTIAL'.   See also string variable
                          LetCN.
                     RN   Reference notation.  Prints `In reference  to:'  and
                          the  argument  two  lines  below the date line.  See
                          also string variable LetRN.
                     AT   Attention.  Prints  `ATTENTION:'  and  the  argument
                          below  the inside address.  See also string variable
                          LetAT.
                     SA   Salutation.  Prints `To Whom It May Concern:' or the
                          argument  if  it  was  present.   The  salutation is
                          printed two lines below  the  inside  address.   See
                          also string variable LetSA.
                     SJ   Subject   line.   Prints  the  argument  as  subject
                          prefixed with `SUBJECT:' two lines below the  inside
                          address,  except  in  letter  type  `SP',  where the
                          subject  is  printed  in  all-capital  without   any
                          prefix.  See also string variable LetSJ.

       MC column-size [column-separation]
              Begin  multiple  columns.  Return to normal with 1C.  MC creates
              as many columns as the current line length permits.  column-size
              is  the width of each column, and column-separation is the space
              between two columns.  Default separation is column-size/15.  See
              also 1C.

       ML mark [text-indent [1]]
              Marked  list  start.   The  mark argument is printed before each
              list item.  text-indent sets the indent  and  overrides  Li.   A
              third  argument  prohibits  printing of a blank line before each
              item.

       MT [arg [addressee]]
              Memorandum type.  The argument arg is  part  of  a  filename  in
              `/usr/share/groff/1.21/tmac/mm/*.MT'.   Memorandum  types 0 to 5
              are supported, including type `string'  (which  gets  internally
              mapped  to type 6).  addressee just sets a variable, used in the
              AT&T macros.

              arg

                     0   Normal memorandum, no type printed.
                     1   Memorandum with `MEMORANDUM FOR FILE' printed.
                     2   Memorandum with `PROGRAMMER'S NOTES' printed.
                     3   Memorandum with `ENGINEER'S NOTES' printed.
                     4   Released paper style.
                     5   External letter style.

              See also COVER/COVEND, a more flexible type of front page.

       MOVE y-pos [x-pos [line-length]]
              Move to a position, setting page  offset  to  x-pos.   If  line-
              length is not given, the difference between current and new page
              offset is used.  Use  PGFORM  without  arguments  to  return  to
              normal.

       MULB cw1 space1 [cw2 space2 [cw3 ...]]
              Begin  a  special multi-column mode.  All columns widths must be
              specified.  The space between  the  columns  must  be  specified
              also.  The last column does not need any space definition.  MULB
              starts a diversion, and MULE ends the diversion and  prints  the
              columns.  The unit for the width and space arguments is `n', but
              MULB accepts all normal unit specifications like  `c'  and  `i'.
              MULB operates in a separate environment.

       MULN   Begin  the  next  column.   This  is  the only way to switch the
              column.

       MULE   End the multi-column mode and print the columns.

       nP [type]
              Print numbered paragraph with header level two.  See .P.

       NCOL   Force printing to the next column.  Don't use this together with
              the MUL* macros, see 2C.

       NS [arg [1]]
              Print  different  types  of  notations.   The  argument  selects
              between  the  predefined  type  of  notations.   If  the  second
              argument  is  available,  then  the  argument becomes the entire
              notation.  If the argument doesn't select a predefined type,  it
              is  printed  as  `Copy  (arg)  to'.   It is possible to add more
              standard notations, see the string variables Letns and Letnsdef.

                     Arg    Notation
                     none   Copy To
                     ""     Copy To
                     1      Copy To (with att.) to
                     2      Copy To (without att.) to

                     3      Att.
                     4      Atts.
                     5      Enc.
                     6      Encs.
                     7      Under separate cover
                     8      Letter to
                     9      Memorandum to
                     10     Copy (with atts.) to
                     11     Copy (without atts.) to
                     12     Abstract Only to
                     13     Complete Memorandum to
                     14     CC

       ND new-date
              New date.  Overrides the current date.  Date is not  printed  if
              new-date is an empty string.

       OF [arg]
              Odd-page  footer,  a  line printed just above the normal footer.
              See EF and PF.

              This macro defines string EOPof.

       OH [arg]
              Odd-page header, a line printed just below  the  normal  header.
              See EH and PH.

              This macro defines string TPoh.

       OP     Make  sure  that  the following text is printed at the top of an
              odd-numbered page.  Does not output an empty page  if  currently
              at the top of an odd page.

       P [type]
              Begin new paragraph.  P without argument produces left-justified
              text, even the first line of the paragraph.  This is the same as
              setting type to 0.  If the argument is 1, the first line of text
              following P is indented  by  the  number  of  spaces  in  number
              register Pi, by default 5.

              Instead  of  giving  an  argument to P it is possible to set the
              paragraph type in number register Pt.  Using 0 and 1 is the same
              as adding that value to P.  A value of 2 indents all paragraphs,
              except after headings, lists, and displays (this value can't  be
              used as an argument to P itself).

              The  space  between  two  paragraphs  is  controlled  by  number
              register Ps, and is 1 by default (one blank line).

       PGFORM [linelength [pagelength [pageoffset [1]]]]
              Set line length, page length, and/or page  offset.   This  macro
              can be used for special formatting, like letter heads and other.
              It is normally the first command in a file,  though  it  is  not
              necessary.   PGFORM  can  be  used  without  arguments  to reset
              everything after a MOVE call.  A line break is done  unless  the
              fourth  argument  is  given.  This can be used to avoid the page
              number on the first page while setting  new  width  and  length.
              (It seems as if this macro sometimes doesn't work too well.  Use
              the command line arguments to change line length,  page  length,
              and page offset instead.)

       PGNH   No  header  is printed on the next page.  Used to get rid of the
              header in letters or other special texts.  This  macro  must  be
              used  before  any  text  to inhibit the page header on the first
              page.

       PIC [-L] [-C] [-R] [-I n] filename [width [height]]
              Include a PostScript file in the document.  The macro depends on
              mmroff(1)  and INITR.  The arguments -L, -C, -R, and -I n adjust
              the picture or indent it.  The optional  width  and  height  can
              also be given to resize the picture.

       PE     Picture end.  Ends a picture for pic(@MAN1EXT).

       PF [arg]
              Page  footer.   PF  sets the line to be printed at the bottom of
              each  page.   Empty  by  default.   See  PH  for  the   argument
              specification.

              This macro defines string EOPf.

       PH [arg]
              Page  header,  a  line  printed  at  the  top of each page.  The
              argument should be specified as

                     "'left-part'center-part'right-part'"

              where left-part, center-part, and right-part are  printed  left-
              justified,  centered, and right justified, respectively.  Within
              the argument to PH, the character `%' is changed to the  current
              page number.  The default argument is

                     "''- % -''"

              which gives the page number between two dashes.

              This macro defines string TPh.

       PS     Picture start (from pic).  Begins a picture for pic(1).

       PX     Page  header user-defined exit.  This macro is called just after
              the printing of the page header in no-space mode.

       R      Roman.  Return to roman font, see also I.

       RB [roman-text [bold-text [roman-text [...]]]]
              Roman-bold.   Even  arguments  are  printed  in  roman,  odd  in
              boldface.  See I.

       RD [prompt [diversion [string]]]
              Read  from  standard input to diversion and/or string.  The text
              is saved in a diversion named diversion.   Recall  the  text  by
              writing  the name of the diversion after a dot on an empty line.
              A string is also defined if string is given.   Diversion  and/or
              prompt can be empty ("").

       RF     Reference  end.   Ends  a  reference  definition  and returns to
              normal processing.  See RS.

       RI [roman-text [italic-text [roman-text [...]]]]
              Print even arguments in roman, odd in italic.  See I.

       RL [text-indent[1]]
              Reference list start.  Begins a list where each item is preceded
              with   an   automatically   incremented  number  between  square
              brackets.  text-indent changes the default indentation.

       RP [arg1 [arg2]]
              Produce reference page.  This macro can be used if  a  reference
              page  is  wanted somewhere in the document.  It is not needed if
              TC is used to produce a table of contents.  The  reference  page
              is then printed automatically.

              The reference counter is not reset if arg1 is 1.

              arg2 tells RP whether to eject a page or not.

              arg2

                     0   The  reference  page  is  printed on a separate page.
                         This is the default.
                     1   Do not eject page after the list.
                     2   Do not eject page before the list.
                     3   Do not eject page before and after the list.

              The reference items are separated  by  a  blank  line.   Setting
              number register Ls to 0 suppresses the line.

              The  string  Rp  contains the reference page title and is set to
              `REFERENCES' by default.

       RS [string-name]
              Begin an automatically numbered reference definition.   Put  the
              string  \*(Rf  where  the reference mark should be and write the
              reference between RS/RF at next new  line  after  the  reference
              mark.  The reference number is stored in number register :R.  If
              string-name is given, a string with that  name  is  defined  and
              contains   the  current  reference  mark.   The  string  can  be
              referenced as \*[string-name] later in the text.

       S [size [spacing]]
              Set point size and vertical spacing.  If any argument  is  equal
              to  `P', the previous value is used.  A `C' means current value,
              and `D' the default value.  If `+' or `-'  is  used  before  the
              value,   the   current  value  is  incremented  or  decremented,
              respectively.

       SA [arg]
              Set right-margin justification.  Justification is turned  on  by
              default.   No argument or value `0' turns off justification, and
              `1' turns on justification.

       SETR refname [string]
              Remember the current header and page number as  refname.   Saves
              string  if  string is defined.  string is retrieved with .GETST.
              See INITR.

       SG [arg [1]]
              Signature line.  Prints the authors  name(s)  after  the  formal
              closing.   The  argument  is  appended  to  the  reference data,
              printed at either the first or last author.  The reference  data
              is  the  location,  department, and initials specified with .AU.
              It is printed at the first author  if  the  second  argument  is
              given,  otherwise  at the last.  No reference data is printed if
              the  author(s)  is  specified  through  .WA/.WE.   See   section
              INTERNALS.

       SK [pages]
              Skip  pages.   If pages is 0 or omitted, a skip to the next page
              occurs unless it is already at the top of a page.  Otherwise  it
              skips pages pages.

       SM string1 [string2 [string3]]
              Make  a  string  smaller.   If string2 is given, string1 is made
              smaller and string2 stays  at  normal  size,  concatenated  with
              string1.   With three arguments, everything is concatenated, but
              only string2 is made smaller.

       SP [lines]
              Space vertically.  lines can have any scaling factor, like  `3i'
              or  `8v'.   Several SP calls in a line only produces the maximum
              number of lines, not the sum.  SP  is  ignored  also  until  the
              first  text line in a page.  Add \& before a call to SP to avoid
              this.

       TAB    Reset tabs to every 5n.  Normally used to reset any previous tab
              positions.

       TB [title [override [flag [refname]]]]
              Table title.  The arguments are the same as for EC.  TB uses the
              number register Tb as a counter.  The  string  Lt  controls  the
              title  of the List of Tables; default value is `LIST OF TABLES'.
              The List of Tables is only printed if number register Lt  is  1,
              which  is  the  default.   The  string  Litb  contains  the word
              `TABLE', which is printed before the number.

              Special handling of the title occurs if TB is used inside DS/DE,
              it is not affected by the format of DS.

       TC [slevel [spacing [tlevel [tab [h1 [h2 [h3 [h4 [h5]]]]]]]]]
              Table of contents.  This macro is normally used as the last line
              of the document.  It generates a table of contents with headings
              up  to the level controlled by number register Cl.  Note that Cl
              controls the saving of headings, it has nothing to do  with  TC.
              Headings  with  a level less than or equal to slevel get spacing
              number of lines before them.  Headings with a level less than or
              equal  to  tlevel  have  their page numbers right-justified with
              dots or spaces separating the text and the page number.   Spaces
              are  used  if  tab  is greater than zero, dots otherwise.  Other
              headings have the page number directly at the end of the heading
              text (ragged-right).

              The rest of the arguments is printed, centered, before the table
              of contents.

              The user-defined macros TX and TY are used if TC is called  with
              at most four arguments.  TX is called before the printing of the
              string  `CONTENTS',  and  TY  is  called  instead  of   printing
              `CONTENTS'.

              Equivalent  macros  can  be defined for list of figures, tables,
              equations and exhibits by defining TXxx or  TYxx,  where  xx  is
              `Fg', `TB', `EC', or `EX', respectively.

              String  Ci  can  be  set  to  control  the indentations for each
              heading-level.  It must be scaled, like

                     .ds Ci .25i .5i .75i 1i 1i

              By default, the indentation is controlled by the maximum  length
              of headings in each level.

              The  string  variables Lifg, Litb, Liex, Liec, and Licon contain
              `Figure',  `TABLE',  `Exhibit',  `Equation',   and   `CONTENTS',
              respectively.  These can be redefined to other languages.

       TE     Table end.  See TS.

       TH [N] Table  header.   See TS.  TH ends the header of the table.  This
              header is printed again if a page break  occurs.   Argument  `N'
              isn't implemented yet.

       TL [charging-case-number [filing-case-number]]
              Begin  title  of  memorandum.   All  text  up  to the next AU is
              included in the title.   charging-case-number  and  filing-case-
              number are saved for use in the front page processing.

       TM [num1 [num2 [...]]]
              Technical  memorandum  numbers used in .MT.  An unlimited number
              of arguments may be given.

       TP     Top-of-page user-defined macro.  This macro is called instead of
              the  normal page header.  It is possible to get complete control
              over the header.  Note  that  the  header  and  the  footer  are
              printed  in  a  separate environment.  Line length is preserved,
              though.  See EOP.

              strings available to TP

              TPh    argument of PH
              TPeh   argument of EH
              TPoh   argument of OH

       TS [H] Table start.  This is the start  of  a  table  specification  to
              tbl(1).   TS ends with TE.  Argument `H' tells mm that the table
              has a header.  See TH.

       TX     User-defined table of contents exit.  This macro is called  just
              before TC prints the word `CONTENTS'.  See TC.

       TY     User-defined  table  of  contents  exit.   This  macro is called
              instead of printing `CONTENTS'.  See TC.

       VERBON [flag [point-size [font]]]
              Begin verbatim output using Courier font.  Usually for  printing
              programs.   All characters have equal width.  The point size can
              be changed with the second  argument.   By  specifying  a  third
              argument  it is possible to use another font instead of Courier.
              flag controls several special features.  Its value is the sum of
              all wanted features.

                     Arg   Description
                     1     Disable the escape character (\).  This is normally
                           turned on during verbose output.
                     2     Add an empty line before the verbose text.
                     4     Add an empty line after the verbose text.
                     8     Print the verbose text with numbered  lines.   This
                           adds  four  digit-sized  spaces in the beginning of
                           each line.  Finer control  is  available  with  the
                           string  variable Verbnm.  It contains all arguments
                           to the troff(1) command .nm, normally `1'.
                     16    Indent  the  verbose  text  by   `5n'.    This   is
                           controlled   by   the  number-variable  Verbin  (in
                           units).

       VERBOFF
              End verbatim output.

       VL text-indent [mark-indent [1]]
              Variable-item list.  It has no fixed mark, it assumes that every
              LI has a mark instead.  text-indent sets the indent to the text,
              and mark-indent the distance from the current indentation to the
              mark.   A  third  argument  prohibits  printing  of a blank line
              before each item.

       VM [-T] [top [bottom]]
              Vertical margin.  Increase the top and bottom margin by top  and
              bottom,  respectively.   If  option  -T  is specified, set those
              margins to top and bottom.  If no argument is given,  reset  the
              margin  to  zero, or to the default (`7v 5v') if -T is used.  It
              is highly recommended that macros TP and/or EOP are  defined  if
              using  -T  and setting top and/or bottom margin to less than the
              default.

       WA [writer-name [title]]
              Begin specification of the writer and writer's address.  Several
              names  can  be  specified  with  empty WA/WE pairs, but only one
              address.

       WE     End the address specification after .WA.

       WC [format1] [format2] [...]
              Footnote and display width control.

              N     Set default mode which is equal to using the options  -WF,
                    -FF, -WD, and FB.
              WF    Wide footnotes, wide also in two-column mode.
              -WF   Normal footnote width, follow column mode.
              FF    All  footnotes  gets  the same width as the first footnote
                    encountered.
              -FF   Normal footnotes, width follows WF and -WF.
              WD    Wide displays, wide also in two-column mode.
              -WD   Normal display width, follow column mode.

              FB    Floating displays generates a line break when  printed  on
                    the current page.
              -FB   Floating displays does not generate line break.

   Strings used in mm
       App    A string containing the word `APPENDIX'.

       Apptxt The current appendix text.

       EM     Em dash string

       H1txt  Updated by .H and .HU to the current heading text.  Also updated
              in table of contents & friends.

       HF     Font list for headings, `2 2 2 2 2 2 2' by default.  Non-numeric
              font names may also be used.

       HP     Point  size list for headings.  By default, this is `0 0 0 0 0 0
              0' which is the same as `10 10 10 10 10 10 10'.

       Index  Contains the string `INDEX'.

       Indcmd Contains the index command.  Default value is `sort -t\t'.

       Lifg   String containing `Figure'.

       Litb   String containing `TABLE'.

       Liex   String containing `Exhibit'.

       Liec   String containing `Equation'.

       Licon  String containing `CONTENTS'.

       Lf     Contains the string `LIST OF FIGURES'.

       Lt     Contains the string `LIST OF TABLES'.

       Lx     Contains the string `LIST OF EXHIBITS'.

       Le     Contains the string `LIST OF EQUATIONS'.

       Letfc  Contains the string `Yours very truly,', used in .FC.

       Letapp Contains the string `APPROVED:', used in .AV.

       Letdate
              Contains the string `Date', used in .AV.

       LetCN  Contains the string `CONFIDENTIAL', used in .LO CN.

       LetSA  Contains the string `To Whom It May Concern:', used in .LO SA.

       LetAT  Contains the string `ATTENTION:', used in .LO AT.

       LetSJ  Contains the string `SUBJECT:', used in .LO SJ.

       LetRN  Contains the string `In reference to:', used in .LO RN.

       Letns  is an array containing the different strings used in .NS.  It is
              really  a  number  of string variables prefixed with Letns!.  If
              the argument doesn't exist,  it  is  included  between  ()  with
              Letns!copy  as  a  prefix and Letns!to as a suffix.  Observe the
              space after `Copy' and before `to'.

                     Name         Value
                     Letns!0      Copy to
                     Letns!1      Copy (with att.) to
                     Letns!2      Copy (without att.) to
                     Letns!3      Att.
                     Letns!4      Atts.

                     Letns!5      Enc.
                     Letns!6      Encs.
                     Letns!7      Under separate cover
                     Letns!8      Letter to
                     Letns!9      Memorandum to
                     Letns!10     Copy (with atts.) to
                     Letns!11     Copy (without atts.) to
                     Letns!12     Abstract Only to
                     Letns!13     Complete Memorandum to
                     Letns!14     CC
                     Letns!copy   Copy \"
                     Letns!to     " to

       Letnsdef
              Define the standard notation used when no argument is  given  to
              .NS.  Default is 0.

       MO1 - MO12
              Strings containing the month names `January' through `December'.

       Qrf    String containing `See chapter \\*[Qrfh], page \\n[Qrfp].'.

       Rp     Contains the string `REFERENCES'.

       Tcst   Contains the current status of the table of contents and list of
              figures, etc.  Empty outside of  .TC.   Useful  in  user-defined
              macros like .TP.

                     Value   Meaning
                     co      Table of contents
                     fg      List of figures
                     tb      List of tables
                     ec      List of equations
                     ex      List of exhibits
                     ap      Appendix

       Tm     Contains the string `\(tm', the trade mark symbol.

       Verbnm Argument to .nm in the .VERBON command.  Default is 1.

   Number variables used in mm
       Aph    Print  an  appendix  page for every new appendix  if this number
              variable is non-zero.  No output occurs  if  Aph  is  zero,  but
              there is always an appendix entry in the `List of contents'.

       Cl     Contents level (in the range 0 to 14).  The contents is saved if
              a heading level is lower than or  equal  to  the  value  of  Cl.
              Default is 2.

       Cp     Eject  page  between list of table, list of figure, etc., if the
              value of Cp is zero.  Default is 0.

       D      Debug flag.  Values greater than zero produce debug  information
              of  increasing  verbosity.  A value of 1 gives information about
              the progress of formatting.  Default is 0.

       De     If set to 1, eject after floating display  is  output.   Default
              is 0.

       Dsp    If defined, it controls the space output before and after static
              displays.  Otherwise the value of Lsp is used.

       Df     Control floating keep output.  This is a number in the  range  0
              to 5, with a default value of 5.  See .DF.

       Ds     If  set  to  1,  use  the amount of space stored in register Lsp
              before and after display.  Default is 1.

       Ej     If set  to  1,  eject  page  before  each  first-level  heading.
              Default is 0.

       Eq     Equation labels are left-adjusted if set to 0 and right-adjusted
              if set to 1.  Default is 0.

       Fs     Footnote spacing.  Default is 1.

       H1 - H7
              Heading counters

       H1dot  Append a dot after the level-one  heading  number  if  value  is
              greater than zero.  Default is 1.

       H1h    A  copy of number register H1, but it is incremented just before
              the page break.  Useful in user-defined header macros.

       Hb     Heading break level.  A number in the range  0  to  14,  with  a
              default value of 2.  See .H.

       Hc     Heading  centering level.  A number in the range 0 to 14, with a
              default value value of 0.  See .H.

       Hi     Heading temporary indent.  A number in the range 0 to 2, with  a
              default value of 1.

                     0   no indentation, left margin
                     1   indent to the right, similar to `.P 1'
                     2   indent to line up with text part of preceding heading

       Hps    Heading  pre-space  level.  If the heading level is less than or
              equal to Hps, two lines precede the section heading  instead  of
              one.   Default is first level only.  The real amount of lines is
              controlled by the variables Hps1 and Hps2.

       Hps1   Number of lines preceding .H if the  heading  level  is  greater
              than Hps.  Value is in units, default is 0.5.

       Hps2   Number  of  lines preceding .H if the heading level is less than
              or equal to Hps.  Value is in units, default is 1.

       Hs     Heading space level.  A number in the range  0  to  14,  with  a
              default value of 2.  See .H.

       Hss    Number  of  lines following .H if the heading level is less than
              or equal to Hs.  Value is in units, default is 1.

       Ht     Heading numbering type.

                     0   multiple levels (1.1.1, 1.1.2, etc.)
                     1   single level

              Default is 0.

       Hu     Unnumbered heading level.  Default is 2.

       Hy     Hyphenation status of text body.

                     0   no hyphenation
                     1   hyphenation on, set to value 14

              Default is 0.

       Iso    Set this variable to 1 on  the  command  line  to  get  an  ISO-
              formatted date string (-rIso=1).  Useless inside of a document.

       L      Page length, only for command line settings.

       Letwam Maximum  lines  in  return-address,  used  in  .WA/.WE.  Default
              is 14.

       Lf, Lt, Lx, Le
              Enable (1) or disable (0) the printing of List of figures,  List
              of tables, List of exhibits and List of equations, respectively.
              Default values are Lf=1, Lt=1, Lx=1, and Le=0.

       Li     List indentation, used by .AL.  Default is 6.

       Limsp  A flag controlling the insertion of  space  between  prefix  and
              mark in automatic lists (.AL).

                     0   no space
                     1   emit space

       Ls     List  space threshold.  If current list level is greater than Ls
              no spacing occurs around lists.  Default is 99.

       Lsp    The vertical space used by an empty line.  The default  is  0.5v
              in troff mode and 1v in nroff mode.

       N      Page numbering style.

                     0   normal header for all pages.
                     1   header  replaces  footer  on  first  page,  header is
                         empty.
                     2   page header is removed on the first page.
                     3   `section-page' numbering style enabled.
                     4   page header is removed on the first page.
                     5   `section-page' and `section-figure'  numbering  style
                         enabled.

              Default is 0.  See also the number registers Sectf and Sectp.

       Np     A flag to control whether paragraphs are numbered.

                     0   not numbered
                     1   numbered in first-level headings.

              Default is 0.

       O      Page offset, only for command line settings.

       Of     Format of figure, table, exhibit, and equation titles.

                     0   ". "
                     1   " - "

              Default is 0.

       P      Current  page-number,  normally the same as `%' unless `section-
              page' numbering style is enabled.

       Pi     Paragraph indentation.  Default is 5.

       Pgps   A flag to control whether header and footer  point  size  should
              follow  the  current settings or just change when the header and
              footer are defined.

                     0   Point size only changes to the current  setting  when
                         .PH, .PF, .OH, .EH, .OF, or .OE is executed.
                     1   Point  size  changes  after  every  .S.   This is the
                         default.

       Ps     Paragraph spacing.  Default is 1.

       Pt     Paragraph type.

                     0   left-justified
                     1   indented paragraphs
                     2   indented paragraphs except after .H, .DE, or .LE.

              Default is 0.

       Sectf  A flag controlling `section-figures' numbering  style.   A  non-
              zero value enables this.  See also register N.

       Sectp  A  flag  controlling `section-page' numbering style.  A non-zero
              value enables this.  See also register N.

       Si     Display indentation.  Default is 5.

       Verbin Indentation for .VERBON.  Default is 5n.

       W      Line length, only for command line settings.

       .mgm   Always 1.

INTERNALS

       The letter macros are using different submacros depending on the letter
       type.   The  name of the submacro has the letter type as suffix.  It is
       therefore possible to define other letter types, either in the national
       macro-file,  or  as  local additions.  .LT sets the number variables Pt
       and Pi to 0 and 5, respectively.  The following strings and macros must
       be defined for a new letter type.

       let@init_type
              This  macro  is  called  directly  by  .LT.   It  is supposed to
              initialize variables and other stuff.

       let@head_type
              This macro prints the letter head, and is called instead of  the
              normal  page  header.   It  is  supposed  to  remove  the  alias
              let@header, otherwise it is called for all pages.

       let@sg_type name title n flag [arg1 [arg2 [...]]]
              .SG is calling this macro only for letters; memorandums have its
              own  processing.   name and title are specified through .WA/.WB.
              n is the counter, 1-max, and flag is true  for  the  last  name.
              Any other argument to .SG is appended.

       let@fc_type closing
              This  macro  is called by .FC, and has the formal closing as the
              argument.

       .LO is implemented as a general option-macro.  It demands that a string
       named  Lettype  is  defined,  where  type is the letter type.  .LO then
       assigns the argument to the string variable let*lo-type.

AUTHOR

       Jorgen Hagg, Lund, Sweden <jh@axis.se>.

FILES

       /usr/share/groff/1.21/tmac/m.tmac

       /usr/share/groff/1.21/tmac/mm/*.cov

       /usr/share/groff/1.21/tmac/mm/*.MT

       /usr/share/groff/1.21/tmac/mm/locale

SEE ALSO

       groff(1), troff(1), tbl(1), pic(1), eqn(1)
       groff_mmse(7)