This is groff, produced by makeinfo version 4.2 from ./groff.texinfo.
This manual documents GNU `troff' version 1.18.
Copyright (C) 1994-2000, 2001, 2002 Free Software Foundation, Inc.
Permission is granted to copy, distribute and/or modify this
document under the terms of the GNU Free Documentation License,
Version 1.1 or any later version published by the Free Software
Foundation; with no Invariant Sections, with the Front-Cover texts
being `A GNU Manual," and with the Back-Cover Texts as in (a)
below. A copy of the license is included in the section entitled
`GNU Free Documentation License."
(a) The FSF's Back-Cover Text is: `You have freedom to copy and
modify this GNU Manual, like GNU software. Copies published by
the Free Software Foundation raise funds for GNU development."
INFO-DIR-SECTION Miscellaneous
START-INFO-DIR-ENTRY
* Groff: (groff). The GNU troff document formatting system.
END-INFO-DIR-ENTRY
File: groff, Node: Concept Index, Prev: Program and File Index, Up: Top
Concept Index
*************
* Menu:
* ", at end of sentence <1>: Using Symbols.
* ", at end of sentence: Sentences.
* ", in a macro argument: Request Arguments.
* %, as delimiter: Escapes.
* &, as delimiter: Escapes.
* ', as a comment: Comments.
* ', at end of sentence <1>: Using Symbols.
* ', at end of sentence: Sentences.
* ', delimiting arguments: Escapes.
* (, as delimiter: Escapes.
* (, starting a two-character identifier <1>: Escapes.
* (, starting a two-character identifier: Identifiers.
* ), as delimiter: Escapes.
* ), at end of sentence <1>: Using Symbols.
* ), at end of sentence: Sentences.
* *, as delimiter: Escapes.
* *, at end of sentence <1>: Using Symbols.
* *, at end of sentence: Sentences.
* +, and page motion: Expressions.
* +, as delimiter: Escapes.
* -, and page motion: Expressions.
* -, as delimiter: Escapes.
* ., as delimiter: Escapes.
* .h register, difference to nl: Diversions.
* .ps register, in comparison with .psr: Fractional Type Sizes.
* .s register, in comparison with .sr: Fractional Type Sizes.
* .S register, Plan 9 alias for .tabs: Tabs and Fields.
* .t register, and diversions: Diversion Traps.
* .tabs register, Plan 9 alias (.S): Tabs and Fields.
* .V register, and vs: Changing Type Sizes.
* /, as delimiter: Escapes.
* 8-bit input: Font File Format.
* <, as delimiter: Escapes.
* <colon>, as delimiter: Escapes.
* =, as delimiter: Escapes.
* >, as delimiter: Escapes.
* [, macro names starting with, and refer: Identifiers.
* [, starting an identifier <1>: Escapes.
* [, starting an identifier: Identifiers.
* \!, and output: Diversions.
* \!, and trnt: Character Translations.
* \!, in top-level diversion: Diversions.
* \!, incompatibilities with AT&T troff: Implementation Differences.
* \!, used as delimiter: Escapes.
* \$, when reading text for a macro: Copy-in Mode.
* \%, and translations: Character Translations.
* \%, following \X or \Y: Manipulating Hyphenation.
* \%, in \X: Postprocessor Access.
* \%, incompatibilities with AT&T troff: Implementation Differences.
* \%, used as delimiter: Escapes.
* \&, and glyph definitions: Using Symbols.
* \&, and translations: Character Translations.
* \&, at end of sentence: Sentences.
* \&, escaping control characters: Requests.
* \&, in \X: Postprocessor Access.
* \&, incompatibilities with AT&T troff: Implementation Differences.
* \&, used as delimiter: Escapes.
* \', and translations: Character Translations.
* \', incompatibilities with AT&T troff: Implementation Differences.
* \', used as delimiter: Escapes.
* \(, and translations: Character Translations.
* \), in \X: Postprocessor Access.
* \), used as delimiter: Escapes.
* \*, and warnings: Warnings.
* \*, incompatibilities with AT&T troff: Implementation Differences.
* \*, when reading text for a macro: Copy-in Mode.
* \, disabling (eo): Character Translations.
* \,, used as delimiter: Escapes.
* \-, and translations: Character Translations.
* \-, incompatibilities with AT&T troff: Implementation Differences.
* \-, used as delimiter: Escapes.
* \/, used as delimiter: Escapes.
* \0, used as delimiter: Escapes.
* \<colon>, in \X: Postprocessor Access.
* \<colon>, used as delimiter: Escapes.
* \<RET>, when reading text for a macro: Copy-in Mode.
* \<SP>, difference to \~: Request Arguments.
* \<SP>, incompatibilities with AT&T troff: Implementation Differences.
* \<SP>, used as delimiter: Escapes.
* \?, in top-level diversion: Diversions.
* \?, incompatibilities with AT&T troff: Implementation Differences.
* \?, used as delimiter: Escapes.
* \@, used as delimiter: Escapes.
* \[, and translations: Character Translations.
* \\, when reading text for a macro: Copy-in Mode.
* \^, incompatibilities with AT&T troff: Implementation Differences.
* \^, used as delimiter: Escapes.
* \_, and translations: Character Translations.
* \_, incompatibilities with AT&T troff: Implementation Differences.
* \_, used as delimiter: Escapes.
* \`, and translations: Character Translations.
* \`, incompatibilities with AT&T troff: Implementation Differences.
* \`, used as delimiter: Escapes.
* \A, allowed delimiters: Escapes.
* \a, and translations: Character Translations.
* \A, incompatibilities with AT&T troff: Implementation Differences.
* \a, used as delimiter: Escapes.
* \B, allowed delimiters: Escapes.
* \b, limitations: Drawing Requests.
* \b, possible quote characters: Escapes.
* \C, allowed delimiters: Escapes.
* \c, and fill mode: Line Control.
* \c, and no-fill mode: Line Control.
* \C, and translations: Character Translations.
* \c, incompatibilities with AT&T troff: Implementation Differences.
* \c, used as delimiter: Escapes.
* \D, allowed delimiters: Escapes.
* \d, used as delimiter: Escapes.
* \e, and glyph definitions: Using Symbols.
* \e, and translations: Character Translations.
* \e, incompatibilities with AT&T troff: Implementation Differences.
* \e, used as delimiter: Escapes.
* \E, used as delimiter: Escapes.
* \e, used as delimiter: Escapes.
* \F, and changing fonts: Changing Fonts.
* \F, and font positions: Font Positions.
* \f, and font translations: Changing Fonts.
* \f, incompatibilities with AT&T troff: Implementation Differences.
* \H, allowed delimiters: Escapes.
* \h, allowed delimiters: Escapes.
* \H, incompatibilities with AT&T troff: Implementation Differences.
* \H, using + and -: Expressions.
* \H, with fractional type sizes: Fractional Type Sizes.
* \L, allowed delimiters: Escapes.
* \l, allowed delimiters: Escapes.
* \L, and glyph definitions: Using Symbols.
* \l, and glyph definitions: Using Symbols.
* \N, allowed delimiters: Escapes.
* \N, and translations: Character Translations.
* \n, and warnings: Warnings.
* \n, incompatibilities with AT&T troff: Implementation Differences.
* \n, when reading text for a macro: Copy-in Mode.
* \o, possible quote characters: Escapes.
* \p, used as delimiter: Escapes.
* \R, after \c: Line Control.
* \R, allowed delimiters: Escapes.
* \R, and warnings: Warnings.
* \R, difference to nr: Auto-increment.
* \r, used as delimiter: Escapes.
* \R, using + and -: Expressions.
* \S, allowed delimiters: Escapes.
* \s, allowed delimiters: Escapes.
* \S, incompatibilities with AT&T troff: Implementation Differences.
* \s, incompatibilities with AT&T troff: Implementation Differences.
* \s, using + and -: Expressions.
* \s, with fractional type sizes: Fractional Type Sizes.
* \t, and translations: Character Translations.
* \t, and warnings: Warnings.
* \t, used as delimiter: Escapes.
* \u, used as delimiter: Escapes.
* \v, allowed delimiters: Escapes.
* \v, internal representation: Gtroff Internals.
* \w, allowed delimiters: Escapes.
* \x, allowed delimiters: Escapes.
* \X, and special characters: Postprocessor Access.
* \X, followed by \%: Manipulating Hyphenation.
* \X, possible quote characters: Escapes.
* \Y, followed by \%: Manipulating Hyphenation.
* \Z, allowed delimiters: Escapes.
* \{, incompatibilities with AT&T troff: Implementation Differences.
* \{, used as delimiter: Escapes.
* \|, incompatibilities with AT&T troff: Implementation Differences.
* \|, used as delimiter: Escapes.
* \}, and warnings: Warnings.
* \}, incompatibilities with AT&T troff: Implementation Differences.
* \}, used as delimiter: Escapes.
* \~, and translations: Character Translations.
* \~, difference to \<SP>: Request Arguments.
* \~, used as delimiter: Escapes.
* ], as part of an identifier: Identifiers.
* ], at end of sentence <1>: Using Symbols.
* ], at end of sentence: Sentences.
* ], ending an identifier <1>: Escapes.
* ], ending an identifier: Identifiers.
* ], macro names starting with, and refer: Identifiers.
* aborting (ab): Debugging.
* absolute position operator (|): Expressions.
* accent marks [ms]: ms Strings and Special Characters.
* access of postprocessor: Postprocessor Access.
* accessing unnamed glyphs with \N: Font File Format.
* activating kerning (kern): Ligatures and Kerning.
* activating ligatures (lg): Ligatures and Kerning.
* activating track kerning (tkf): Ligatures and Kerning.
* ad request, and hyphenation margin: Manipulating Hyphenation.
* ad request, and hyphenation space: Manipulating Hyphenation.
* adjusting: Filling and Adjusting.
* adjusting and filling, manipulating: Manipulating Filling and Adjusting.
* adjustment mode register (.j): Manipulating Filling and Adjusting.
* alias, diversion, creating (als): Strings.
* alias, macro, creating (als): Strings.
* alias, number register, creating (aln): Setting Registers.
* alias, string, creating (als): Strings.
* als request, and \$0: Parameters.
* am, am1, ami requests, and warnings: Warnings.
* annotations: Footnotes and Annotations.
* appending to a diversion (da): Diversions.
* appending to a file (opena): I/O.
* appending to a macro (am): Writing Macros.
* appending to a string (as): Strings.
* arc, drawing (\D'a ...'): Drawing Requests.
* argument delimiting characters: Escapes.
* arguments to requests: Request Arguments.
* arguments, macro (\$): Parameters.
* arguments, of strings: Strings.
* arithmetic operators: Expressions.
* artificial fonts: Artificial Fonts.
* as, as1 requests, and comments: Comments.
* as, as1 requests, and warnings: Warnings.
* ASCII approximation output register (.A) <1>: Built-in Registers.
* ASCII approximation output register (.A): Groff Options.
* ASCII, encoding: Groff Options.
* asciify request, and writem: I/O.
* assigning formats (af): Assigning Formats.
* assignments, indirect: Interpolating Registers.
* assignments, nested: Interpolating Registers.
* AT&T troff, ms macro package differences: Differences from AT&T ms.
* auto-increment: Auto-increment.
* available glyphs, list (`groff_char(7)' man page): Using Symbols.
* backslash, printing (\\, \e, \E, \[rs]) <1>: Implementation Differences.
* backslash, printing (\\, \e, \E, \[rs]): Escapes.
* backspace character: Identifiers.
* backspace character, and translations: Character Translations.
* backtrace of input stack (backtrace): Debugging.
* baseline: Sizes.
* basic unit (u): Measurements.
* basics of macros: Basics.
* bd request, and font styles: Font Families.
* bd request, and font translations: Changing Fonts.
* bd request, incompatibilities with AT&T troff: Implementation Differences.
* begin of conditional block (\{): if-else.
* beginning diversion (di): Diversions.
* blank line <1>: Requests.
* blank line: Implicit Line Breaks.
* blank line (sp): Basics.
* blank line macro (blm) <1>: Blank Line Traps.
* blank line macro (blm) <2>: Requests.
* blank line macro (blm): Implicit Line Breaks.
* blank line traps: Blank Line Traps.
* blank lines, disabling: Manipulating Spacing.
* block, conditional, begin (\{): if-else.
* block, condititional, end (\}): if-else.
* bold face [man]: Man font macros.
* bold face, imitating (bd): Artificial Fonts.
* bottom margin: Page Layout.
* bounding box: Miscellaneous.
* box rule glyph (\[br]): Drawing Requests.
* box, boxa requests, and warnings: Warnings.
* bp request, and top-level diversion: Page Control.
* bp request, causing implicit linebreak: Manipulating Filling and Adjusting.
* bp request, using + and -: Expressions.
* br glyph, and cflags: Using Symbols.
* break <1>: Manipulating Filling and Adjusting.
* break: Basics.
* break (br): Basics.
* break request, in a while loop: while.
* break, implicit: Implicit Line Breaks.
* built-in registers: Built-in Registers.
* bulleted list, example markup [ms]: Lists in ms.
* c unit: Measurements.
* calling convention of preprocessors: Preprocessors in man pages.
* capabilities of groff: groff Capabilities.
* ce request, causing implicit linebreak: Manipulating Filling and Adjusting.
* ce request, difference to .ad c: Manipulating Filling and Adjusting.
* centered text: Manipulating Filling and Adjusting.
* centering lines (ce) <1>: Manipulating Filling and Adjusting.
* centering lines (ce): Basics.
* centimeter unit (c): Measurements.
* cf request, causing implicit linebreak: Manipulating Filling and Adjusting.
* changing font family (fam, \F): Font Families.
* changing font position (\f): Font Positions.
* changing font style (sty): Font Families.
* changing fonts (ft, \f): Changing Fonts.
* changing format, and read-only registers: Assigning Formats.
* changing the font height (\H): Artificial Fonts.
* changing the font slant (\S): Artificial Fonts.
* changing the page number character (pc): Page Layout.
* changing trap location (ch): Page Location Traps.
* changing type sizes (ps, \s): Changing Type Sizes.
* changing vertical line spacing (vs): Changing Type Sizes.
* char request, and soft hyphen character: Manipulating Hyphenation.
* char request, and translations: Character Translations.
* char request, used with \N: Using Symbols.
* character: Using Symbols.
* character properties (cflags): Using Symbols.
* character translations: Character Translations.
* character, backspace: Identifiers.
* character, backspace, and translations: Character Translations.
* character, control (.): Requests.
* character, control, changing (cc): Character Translations.
* character, defining (char): Using Symbols.
* character, escape, changing (ec): Character Translations.
* character, escape, while defining glyph: Using Symbols.
* character, field delimiting (fc): Fields.
* character, field padding (fc): Fields.
* character, hyphenation (\%): Manipulating Hyphenation.
* character, leader repetition (lc): Leaders.
* character, leader, and translations: Character Translations.
* character, leader, non-interpreted (\a): Leaders.
* character, named (\C): Using Symbols.
* character, newline: Escapes.
* character, newline, and translations: Character Translations.
* character, no-break control ('): Requests.
* character, no-break control, changing (c2): Character Translations.
* character, soft hyphen, setting (shc): Manipulating Hyphenation.
* character, space: Escapes.
* character, special: Character Translations.
* character, tab: Escapes.
* character, tab repetition (tc): Tabs and Fields.
* character, tab, and translations: Character Translations.
* character, tab, non-interpreted (\t): Tabs and Fields.
* character, tabulator: Tab Stops.
* character, transparent <1>: Using Symbols.
* character, transparent: Sentences.
* character, whitespace: Identifiers.
* character, zero width space (\&) <1>: Drawing Requests.
* character, zero width space (\&) <2>: Ligatures and Kerning.
* character, zero width space (\&): Requests.
* characters, argument delimiting: Escapes.
* characters, end-of-sentence: Using Symbols.
* characters, hyphenation: Using Symbols.
* characters, input, and output glyphs, compatibility with AT&T troff: Implementation Differences.
* characters, invalid for trf request: I/O.
* characters, invalid input: Identifiers.
* characters, overlapping: Using Symbols.
* characters, special: Special Characters.
* characters, unnamed, accessing with \N: Font File Format.
* circle, drawing (\D'c ...'): Drawing Requests.
* circle, solid, drawing (\D'C ...'): Drawing Requests.
* closing file (close): I/O.
* code, hyphenation (hcode): Manipulating Hyphenation.
* color, default: Colors.
* colors: Colors.
* command prefix: Environment.
* command-line options: Groff Options.
* commands, embedded: Embedded Commands.
* comments: Comments.
* comments in font files: Font File Format.
* comments, lining up with tabs: Comments.
* comments, with ds: Strings.
* common features: Common Features.
* common name space of macros, diversions, and strings: Strings.
* comparison operators: Expressions.
* compatibility mode <1>: Implementation Differences.
* compatibility mode: Warnings.
* conditional block, begin (\{): if-else.
* conditional block, end (\}): if-else.
* conditional page break (ne): Page Control.
* conditionals and loops: Conditionals and Loops.
* consecutive hyphenated lines (hlm): Manipulating Hyphenation.
* constant glyph space mode (cs): Artificial Fonts.
* contents, table of <1>: Leaders.
* contents, table of: Table of Contents.
* continuation, input line (\): Line Control.
* continuation, output line (\c): Line Control.
* continue request, in a while loop: while.
* continuous underlining (cu): Artificial Fonts.
* control character (.): Requests.
* control character, changing (cc): Character Translations.
* control character, no-break ('): Requests.
* control character, no-break, changing (c2): Character Translations.
* control, line: Line Control.
* control, page: Page Control.
* conventions for input: Input Conventions.
* copy-in mode: Copy-in Mode.
* copy-in mode, and macro arguments: Parameters.
* copy-in mode, and write requests: I/O.
* copying environment (evc): Environments.
* correction between italic and roman glyph (\/, \,): Ligatures and Kerning.
* correction, italic (\/): Ligatures and Kerning.
* correction, left italic (\,): Ligatures and Kerning.
* cover page macros, [ms]: ms Cover Page Macros.
* cp request, and glyph definitions: Using Symbols.
* cp1047: Groff Options.
* creating alias, for diversion (als): Strings.
* creating alias, for macro (als): Strings.
* creating alias, for number register (aln): Setting Registers.
* creating alias, for string (als): Strings.
* creating new characters (char): Using Symbols.
* credits: Credits.
* cs request, and font styles: Font Families.
* cs request, and font translations: Changing Fonts.
* cs request, incompatibilities with AT&T troff: Implementation Differences.
* cs request, with fractional type sizes: Fractional Type Sizes.
* current directory: Macro Directories.
* current input file name register (.F): Built-in Registers.
* current time: I/O.
* current time, hours (hours): Built-in Registers.
* current time, minutes (minutes): Built-in Registers.
* current time, seconds (seconds): Built-in Registers.
* da request, and warnings: Warnings.
* date, day of the month register (dy): Built-in Registers.
* date, day of the week register (dw): Built-in Registers.
* date, month of the year register (mo): Built-in Registers.
* date, year register (year, yr): Built-in Registers.
* day of the month register (dy): Built-in Registers.
* day of the week register (dw): Built-in Registers.
* de request, and while: while.
* de, de1, dei requests, and warnings: Warnings.
* debugging: Debugging.
* default color: Colors.
* default indentation [man]: Miscellaneous man macros.
* default indentation, resetting [man]: Man usage.
* default units: Default Units.
* defining character (char): Using Symbols.
* defining glyph (char): Using Symbols.
* defining symbol (char): Using Symbols.
* delayed text: Footnotes and Annotations.
* delimited arguments, incompatibilities with AT&T troff: Implementation Differences.
* delimiting character, for fields (fc): Fields.
* delimiting characters for arguments: Escapes.
* DESC file, format: DESC File Format.
* devices for output <1>: Output Devices.
* devices for output: Output device intro.
* dg glyph, at end of sentence <1>: Using Symbols.
* dg glyph, at end of sentence: Sentences.
* di request, and warnings: Warnings.
* differences in implementation: Implementation Differences.
* digit width space (\0): Page Motions.
* digits, and delimiters: Escapes.
* dimensions, line: Line Layout.
* directories for fonts: Font Directories.
* directories for macros: Macro Directories.
* directory, current: Macro Directories.
* directory, for tmac files: Macro Directories.
* directory, home: Macro Directories.
* directory, platform-specific: Macro Directories.
* directory, site-specific <1>: Font Directories.
* directory, site-specific: Macro Directories.
* disabling \ (eo): Character Translations.
* disabling hyphenation (\%): Manipulating Hyphenation.
* displays: Displays.
* displays [ms]: ms Displays and Keeps.
* distance to next trap register (.t): Page Location Traps.
* ditroff, the program: History.
* diversion name register (.z): Diversions.
* diversion trap, setting (dt): Diversion Traps.
* diversion traps: Diversion Traps.
* diversion, appending (da): Diversions.
* diversion, beginning (di): Diversions.
* diversion, creating alias (als): Strings.
* diversion, ending (di): Diversions.
* diversion, nested: Diversions.
* diversion, removing (rm): Strings.
* diversion, renaming (rn): Strings.
* diversion, stripping final newline: Strings.
* diversion, top-level: Diversions.
* diversion, top-level, and \!: Diversions.
* diversion, top-level, and \?: Diversions.
* diversion, top-level, and bp: Page Control.
* diversion, unformatting (asciify): Diversions.
* diversion, vertical position in, register (.d): Diversions.
* diversions: Diversions.
* diversions, shared name space with macros and strings: Strings.
* documents, multi-file: Debugging.
* documents, structuring the source code: Requests.
* double quote, in a macro argument: Request Arguments.
* double-spacing (ls) <1>: Manipulating Spacing.
* double-spacing (ls): Basics.
* double-spacing (vs, pvs): Changing Type Sizes.
* drawing a circle (\D'c ...'): Drawing Requests.
* drawing a line (\D'l ...'): Drawing Requests.
* drawing a polygon (\D'p ...'): Drawing Requests.
* drawing a solid circle (\D'C ...'): Drawing Requests.
* drawing a solid ellipse (\D'E ...'): Drawing Requests.
* drawing a solid polygon (\D'P ...'): Drawing Requests.
* drawing a spline (\D'~ ...'): Drawing Requests.
* drawing an arc (\D'a ...'): Drawing Requests.
* drawing an ellipse (\D'e ...'): Drawing Requests.
* drawing horizontal lines (\l): Drawing Requests.
* drawing requests: Drawing Requests.
* drawing vertical lines (\L): Drawing Requests.
* ds request, and comments: Strings.
* ds request, and double quotes: Request Arguments.
* ds request, and leading spaces: Strings.
* ds, ds1 requests, and comments: Comments.
* ds, ds1 requests, and warnings: Warnings.
* dumping number registers (pnr): Debugging.
* dumping symbol table (pm): Debugging.
* dumping traps (ptr): Debugging.
* EBCDIC encoding <1>: Tab Stops.
* EBCDIC encoding: Groff Options.
* EBCDIC encoding of a tab: Tabs and Fields.
* EBCDIC encoding of backspace: Identifiers.
* el request, and warnings: Warnings.
* ellipse, drawing (\D'e ...'): Drawing Requests.
* ellipse, solid, drawing (\D'E ...'): Drawing Requests.
* em glyph, and cflags: Using Symbols.
* em unit (m): Measurements.
* embedded commands: Embedded Commands.
* embedding PostScript: Embedding PostScript.
* embolding of special fonts: Artificial Fonts.
* empty line: Implicit Line Breaks.
* empty line (sp): Basics.
* empty space before a paragraph [man]: Miscellaneous man macros.
* en unit (n): Measurements.
* enabling vertical position traps (vpt): Page Location Traps.
* encoding, ASCII: Groff Options.
* encoding, cp1047: Groff Options.
* encoding, EBCDIC <1>: Tab Stops.
* encoding, EBCDIC: Groff Options.
* encoding, latin-1: Groff Options.
* encoding, utf-8: Groff Options.
* end of conditional block (\}): if-else.
* end-of-input macro (em): End-of-input Traps.
* end-of-input trap, setting (em): End-of-input Traps.
* end-of-input traps: End-of-input Traps.
* end-of-sentence characters: Using Symbols.
* ending diversion (di): Diversions.
* environment number/name register (.ev): Environments.
* environment variables: Environment.
* environment, copying (evc): Environments.
* environment, last glyph: Environments.
* environment, switching (ev): Environments.
* environments: Environments.
* eqn, the program: geqn.
* equations [ms]: ms Insertions.
* escape character, changing (ec): Character Translations.
* escape character, while defining glyph: Using Symbols.
* escapes: Escapes.
* escaping newline characters, in strings: Strings.
* ex request, use in debugging: Debugging.
* ex request, used with nx and rd: I/O.
* example markup, bulleted list [ms]: Lists in ms.
* example markup, glossary-style list [ms]: Lists in ms.
* example markup, multi-page table [ms]: Example multi-page table.
* example markup, numbered list [ms]: Lists in ms.
* example markup, title page: ms Cover Page Macros.
* examples of invocation: Invocation Examples.
* exiting (ex): Debugging.
* expansion of strings (\*): Strings.
* explicit hyphen (\%): Manipulating Hyphenation.
* expression, order of evaluation: Expressions.
* expressions: Expressions.
* expressions, and space characters: Expressions.
* extra post-vertical line space (\x): Changing Type Sizes.
* extra post-vertical line space register (.a): Manipulating Spacing.
* extra pre-vertical line space (\x): Changing Type Sizes.
* extra spaces: Filling and Adjusting.
* extremum operators (>?, <?): Expressions.
* f unit: Measurements.
* f unit, and colors: Colors.
* fam request, and changing fonts: Changing Fonts.
* fam request, and font positions: Font Positions.
* families, font: Font Families.
* FDL, GNU Free Documentation License: GNU Free Documentation License.
* features, common: Common Features.
* fi request, causing implicit linebreak: Manipulating Filling and Adjusting.
* field delimiting character (fc): Fields.
* field padding character (fc): Fields.
* fields: Fields.
* fields, and tabs: Tabs and Fields.
* figures [ms]: ms Insertions.
* file formats: File formats.
* file, appending to (opena): I/O.
* file, closing (close): I/O.
* file, inclusion (so): I/O.
* file, opening (open): I/O.
* file, processing next (nx): I/O.
* file, writing to (write): I/O.
* files, font: Font Files.
* files, macro, searching: Macro Directories.
* fill mode <1>: Warnings.
* fill mode <2>: Manipulating Filling and Adjusting.
* fill mode: Implicit Line Breaks.
* fill mode (fi): Manipulating Filling and Adjusting.
* fill mode, and \c: Line Control.
* filling: Filling and Adjusting.
* filling and adjusting, manipulating: Manipulating Filling and Adjusting.
* final newline, stripping in diversions: Strings.
* fl request, causing implicit linebreak: Manipulating Filling and Adjusting.
* floating keep: Displays.
* flush output (fl): Debugging.
* font description file, format <1>: Font File Format.
* font description file, format: DESC File Format.
* font directories: Font Directories.
* font families: Font Families.
* font family, changing (fam, \F): Font Families.
* font file, format: Font File Format.
* font files: Font Files.
* font files, comments: Font File Format.
* font for underlining (uf): Artificial Fonts.
* font height, changing (\H): Artificial Fonts.
* font path: Font Directories.
* font position register (.f): Font Positions.
* font position, changing (\f): Font Positions.
* font positions: Font Positions.
* font selection [man]: Man font macros.
* font slant, changing (\S): Artificial Fonts.
* font style, changing (sty): Font Families.
* font styles: Font Families.
* font, mounting (fp): Font Positions.
* font, previous (ft, \f[], \fP): Changing Fonts.
* fonts <1>: Changing Fonts.
* fonts: Fonts.
* fonts, artificial: Artificial Fonts.
* fonts, changing (ft, \f): Changing Fonts.
* fonts, PostScript: Font Families.
* fonts, searching: Font Directories.
* fonts, special: Special Fonts.
* footers <1>: Page Location Traps.
* footers: Page Layout.
* footers [ms]: ms Headers and Footers.
* footnotes: Footnotes and Annotations.
* footnotes [ms]: ms Footnotes.
* form letters: I/O.
* format of font description file: DESC File Format.
* format of font description files: Font File Format.
* format of font files: Font File Format.
* format of register (\g): Assigning Formats.
* formats, assigning (af): Assigning Formats.
* formats, file: File formats.
* fp request, and font translations: Changing Fonts.
* fp request, incompatibilities with AT&T troff: Implementation Differences.
* fractional point sizes <1>: Implementation Differences.
* fractional point sizes: Fractional Type Sizes.
* fractional type sizes <1>: Implementation Differences.
* fractional type sizes: Fractional Type Sizes.
* french-spacing: Sentences.
* fspecial request, and font styles: Font Families.
* fspecial request, and font translations: Changing Fonts.
* fspecial request, and imitating bold: Artificial Fonts.
* ft request, and font translations: Changing Fonts.
* geqn, invoking: Invoking geqn.
* geqn, the program: geqn.
* ggrn, invoking: Invoking ggrn.
* ggrn, the program: ggrn.
* glossary-style list, example markup [ms]: Lists in ms.
* glyph: Using Symbols.
* glyph for line drawing: Drawing Requests.
* glyph pile (\b): Drawing Requests.
* glyph properties (cflags): Using Symbols.
* glyph, box rule (\[br]): Drawing Requests.
* glyph, constant space: Artificial Fonts.
* glyph, defining (char): Using Symbols.
* glyph, for line drawing: Drawing Requests.
* glyph, for margins (mc): Miscellaneous.
* glyph, italic correction (\/): Ligatures and Kerning.
* glyph, leader repetition (lc): Leaders.
* glyph, left italic correction (\,): Ligatures and Kerning.
* glyph, numbered (\N) <1>: Using Symbols.
* glyph, numbered (\N): Character Translations.
* glyph, removing definition (rchar): Using Symbols.
* glyph, soft hyphen (hy): Manipulating Hyphenation.
* glyph, tab repetition (tc): Tabs and Fields.
* glyph, underscore (\[ru]): Drawing Requests.
* glyphs, available, list (`groff_char(7)' man page): Using Symbols.
* glyphs, output, and input characters, compatibility with AT&T troff: Implementation Differences.
* glyphs, overstriking (\o): Page Motions.
* glyphs, unnamed: Using Symbols.
* glyphs, unnamed, accessing with \N: Font File Format.
* GNU-specific register (.g): Built-in Registers.
* gpic, invoking: Invoking gpic.
* gpic, the program: gpic.
* grap, the program: grap.
* gray shading (\D'f ...'): Drawing Requests.
* grefer, invoking: Invoking grefer.
* grefer, the program: grefer.
* grn, the program: ggrn.
* grodvi, invoking: Invoking grodvi.
* grodvi, the program: grodvi.
* groff - what is it?: What Is groff?.
* groff capabilities: groff Capabilities.
* groff invocation: Invoking groff.
* groff, and pi request: I/O.
* GROFF_BIN_PATH, environment variable: Environment.
* GROFF_COMMAND_PREFIX, environment variable: Environment.
* GROFF_FONT_PATH, environment variable <1>: Font Directories.
* GROFF_FONT_PATH, environment variable: Environment.
* GROFF_TMAC_PATH, environment variable <1>: Macro Directories.
* GROFF_TMAC_PATH, environment variable: Environment.
* GROFF_TMPDIR, environment variable: Environment.
* GROFF_TYPESETTER, environment variable: Environment.
* grohtml, invoking: Invoking grohtml.
* grohtml, registers and strings: grohtml specific registers and strings.
* grohtml, the program <1>: grohtml.
* grohtml, the program: Groff Options.
* grolbp, invoking: Invoking grolbp.
* grolbp, the program: grolbp.
* grolj4, invoking: Invoking grolj4.
* grolj4, the program: grolj4.
* grops, invoking: Invoking grops.
* grops, the program: grops.
* grotty, invoking: Invoking grotty.
* grotty, the program: grotty.
* gsoelim, invoking: Invoking gsoelim.
* gsoelim, the program: gsoelim.
* gtbl, invoking: Invoking gtbl.
* gtbl, the program: gtbl.
* gtroff, identification register (.g): Built-in Registers.
* gtroff, interactive use: Debugging.
* gtroff, output: gtroff Output.
* gtroff, process ID register ($$): Built-in Registers.
* gtroff, reference: gtroff Reference.
* gxditview, invoking: Invoking gxditview.
* gxditview, the program: gxditview.
* hanging indentation [man]: Man usage.
* hcode request, and glyph definitions: Using Symbols.
* headers <1>: Page Location Traps.
* headers: Page Layout.
* headers [ms]: ms Headers and Footers.
* height, font, changing (\H): Artificial Fonts.
* high-water mark register (.h): Diversions.
* history: History.
* home directory: Macro Directories.
* horizontal input line position register (hp): Page Motions.
* horizontal input line position, saving (\k): Page Motions.
* horizontal line, drawing (\l): Drawing Requests.
* horizontal motion (\h): Page Motions.
* horizontal output line position register (.k): Page Motions.
* horizontal resolution register (.H): Built-in Registers.
* horizontal space (\h): Page Motions.
* horizontal space, unformatting: Strings.
* hours, current time (hours): Built-in Registers.
* hpf request, and hyphenation language: Manipulating Hyphenation.
* hw request, and hyphenation language: Manipulating Hyphenation.
* hy glyph, and cflags: Using Symbols.
* hyphen, explicit (\%): Manipulating Hyphenation.
* hyphenated lines, consecutive (hlm): Manipulating Hyphenation.
* hyphenating characters: Using Symbols.
* hyphenation: Hyphenation.
* hyphenation character (\%): Manipulating Hyphenation.
* hyphenation code (hcode): Manipulating Hyphenation.
* hyphenation language register (.hla): Manipulating Hyphenation.
* hyphenation margin (hym): Manipulating Hyphenation.
* hyphenation margin register (.hym): Manipulating Hyphenation.
* hyphenation patterns (hpf): Manipulating Hyphenation.
* hyphenation restrictions register (.hy): Manipulating Hyphenation.
* hyphenation space (hys): Manipulating Hyphenation.
* hyphenation space register (.hys): Manipulating Hyphenation.
* hyphenation, disabling (\%): Manipulating Hyphenation.
* hyphenation, manipulating: Manipulating Hyphenation.
* i unit: Measurements.
* i/o: I/O.
* IBM cp1047: Groff Options.
* identifiers: Identifiers.
* identifiers, undefined: Identifiers.
* ie request, and warnings: Warnings.
* if request, and the ! operator: Expressions.
* if request, operators to use with: Operators in Conditionals.
* if-else: if-else.
* imitating bold face (bd): Artificial Fonts.
* implementation differences: Implementation Differences.
* implicit breaks of lines: Implicit Line Breaks.
* implicit line breaks: Implicit Line Breaks.
* in request, causing implicit linebreak: Manipulating Filling and Adjusting.
* in request, using + and -: Expressions.
* inch unit (i): Measurements.
* including a file (so): I/O.
* incompatibilities with AT&T troff: Implementation Differences.
* increment value without changing the register: Auto-increment.
* increment, automatic: Auto-increment.
* indentaion, resetting to default [man]: Man usage.
* indentation (in): Line Layout.
* index, in macro package: Indices.
* indirect assignments: Interpolating Registers.
* input and output requests: I/O.
* input characters and output glyphs, compatibility with AT&T troff: Implementation Differences.
* input characters, invalid: Identifiers.
* input conventions: Input Conventions.
* input file name, current, register (.F): Built-in Registers.
* input level in delimited arguments: Implementation Differences.
* input line continuation (\): Line Control.
* input line number register (.c, c.): Built-in Registers.
* input line number, setting (lf): Debugging.
* input line position, horizontal, saving (\k): Page Motions.
* input line trap, setting (it): Input Line Traps.
* input line traps: Input Line Traps.
* input line traps and interrupted lines (itc): Input Line Traps.
* input line, horizontal position, register (hp): Page Motions.
* input stack, backtrace (backtrace): Debugging.
* input stack, setting limit: Debugging.
* input token: Gtroff Internals.
* input, 8-bit: Font File Format.
* input, standard, reading from (rd): I/O.
* inserting horizontal space (\h): Page Motions.
* installation: Installation.
* interactive use of gtroff: Debugging.
* intermediate output: gtroff Output.
* interpolating registers (\n): Interpolating Registers.
* interpolation of strings (\*): Strings.
* interrupted line: Line Control.
* interrupted line register (.int): Line Control.
* interrupted lines and input line traps (itc): Input Line Traps.
* introduction: Introduction.
* invalid characters for trf request: I/O.
* invalid input characters: Identifiers.
* invocation examples: Invocation Examples.
* invoking geqn: Invoking geqn.
* invoking ggrn: Invoking ggrn.
* invoking gpic: Invoking gpic.
* invoking grefer: Invoking grefer.
* invoking grodvi: Invoking grodvi.
* invoking groff: Invoking groff.
* invoking grohtml: Invoking grohtml.
* invoking grolbp: Invoking grolbp.
* invoking grolj4: Invoking grolj4.
* invoking grops: Invoking grops.
* invoking grotty: Invoking grotty.
* invoking gsoelim: Invoking gsoelim.
* invoking gtbl: Invoking gtbl.
* invoking gxditview: Invoking gxditview.
* italic correction (\/): Ligatures and Kerning.
* italic fonts [man]: Man font macros.
* italic glyph, correction after roman glyph (\,): Ligatures and Kerning.
* italic glyph, correction before roman glyph (\/): Ligatures and Kerning.
* justifying text: Manipulating Filling and Adjusting.
* justifying text (rj): Manipulating Filling and Adjusting.
* keep: Displays.
* keep, floating: Displays.
* keeps [ms]: ms Displays and Keeps.
* kerning and ligatures: Ligatures and Kerning.
* kerning enabled register (.kern): Ligatures and Kerning.
* kerning, activating (kern): Ligatures and Kerning.
* kerning, track: Ligatures and Kerning.
* last-requested point size registers (.psr, .sr): Fractional Type Sizes.
* latin-1, encoding: Groff Options.
* layout, line: Line Layout.
* layout, page: Page Layout.
* lc request, and glyph definitions: Using Symbols.
* leader character: Leaders.
* leader character, and translations: Character Translations.
* leader character, non-interpreted (\a): Leaders.
* leader repetition character (lc): Leaders.
* leaders: Leaders.
* leading: Sizes.
* leading spaces: Filling and Adjusting.
* leading spaces with ds: Strings.
* left italic correction (\,): Ligatures and Kerning.
* left margin (po): Line Layout.
* left margin, how to move [man]: Man usage.
* length of a string (length): Strings.
* length of line (ll): Line Layout.
* length of page (pl): Page Layout.
* length of title line (lt): Page Layout.
* letters, form: I/O.
* level of warnings (warn): Debugging.
* ligature: Using Symbols.
* ligatures and kerning: Ligatures and Kerning.
* ligatures enabled register (.lg): Ligatures and Kerning.
* ligatures, activating (lg): Ligatures and Kerning.
* limitations of \b escape: Drawing Requests.
* line break <1>: Manipulating Filling and Adjusting.
* line break <2>: Implicit Line Breaks.
* line break: Basics.
* line break (br): Basics.
* line breaks, with vertical space [man]: Man usage.
* line breaks, without vertical space [man]: Man usage.
* line control: Line Control.
* line dimensions: Line Layout.
* line drawing glyph: Drawing Requests.
* line indentation (in): Line Layout.
* line layout: Line Layout.
* line length (ll): Line Layout.
* line length register (.l): Line Layout.
* line number, input, register (.c, c.): Built-in Registers.
* line number, output, register (ln): Built-in Registers.
* line numbers, printing (nm): Miscellaneous.
* line space, extra post-vertical (\x): Changing Type Sizes.
* line space, extra pre-vertical (\x): Changing Type Sizes.
* line spacing register (.L): Manipulating Spacing.
* line spacing, post-vertical (pvs): Changing Type Sizes.
* line thickness (\D't ...'): Drawing Requests.
* line, blank: Implicit Line Breaks.
* line, drawing (\D'l ...'): Drawing Requests.
* line, empty (sp): Basics.
* line, horizontal, drawing (\l): Drawing Requests.
* line, implicit breaks: Implicit Line Breaks.
* line, input, continuation (\): Line Control.
* line, input, horizontal position, register (hp): Page Motions.
* line, input, horizontal position, saving (\k): Page Motions.
* line, interrupted: Line Control.
* line, output, continuation (\c): Line Control.
* line, output, horizontal position, register (.k): Page Motions.
* line, vertical, drawing (\L): Drawing Requests.
* line-tabs mode: Tabs and Fields.
* lines, blank, disabling: Manipulating Spacing.
* lines, centering (ce) <1>: Manipulating Filling and Adjusting.
* lines, centering (ce): Basics.
* lines, consecutive hyphenated (hlm): Manipulating Hyphenation.
* lines, interrupted, and input line traps (itc): Input Line Traps.
* list: Displays.
* list of available glyphs (`groff_char(7)' man page): Using Symbols.
* ll request, using + and -: Expressions.
* location, vertical, page, marking (mk): Page Motions.
* location, vertical, page, returning to marked (rt): Page Motions.
* logical operators: Expressions.
* long names: Implementation Differences.
* loops and conditionals: Conditionals and Loops.
* lq glyph, and lq string [man]: Predefined man strings.
* ls request, alternative to (pvs): Changing Type Sizes.
* lt request, using + and -: Expressions.
* M unit: Measurements.
* m unit: Measurements.
* machine unit (u): Measurements.
* macro basics: Basics.
* macro directories: Macro Directories.
* macro files, searching: Macro Directories.
* macro name register (\$0): Parameters.
* macro names, starting with [ or ], and refer: Identifiers.
* macro packages <1>: Macro Packages.
* macro packages: Macro Package Intro.
* macro packages, structuring the source code: Requests.
* macro, appending (am): Writing Macros.
* macro, arguments (\$): Parameters.
* macro, creating alias (als): Strings.
* macro, end-of-input (em): End-of-input Traps.
* macro, removing (rm): Strings.
* macro, renaming (rn): Strings.
* macros: Macros.
* macros for manual pages [man]: Man usage.
* macros, recursive: while.
* macros, searching: Macro Directories.
* macros, shared name space with strings and diversions: Strings.
* macros, tutorial for users: Tutorial for Macro Users.
* macros, writing: Writing Macros.
* major quotes: Displays.
* major version number register (.x): Built-in Registers.
* man macros: Man usage.
* man macros, bold face: Man font macros.
* man macros, default indentation: Miscellaneous man macros.
* man macros, empty space before a paragraph: Miscellaneous man macros.
* man macros, hanging indentation: Man usage.
* man macros, how to set fonts: Man font macros.
* man macros, italic fonts: Man font macros.
* man macros, line breaks with vertical space: Man usage.
* man macros, line breaks without vertical space: Man usage.
* man macros, moving left margin: Man usage.
* man macros, resetting default indentation: Man usage.
* man macros, tab stops: Miscellaneous man macros.
* man pages: man.
* manipulating filling and adjusting: Manipulating Filling and Adjusting.
* manipulating hyphenation: Manipulating Hyphenation.
* manipulating spacing: Manipulating Spacing.
* manual pages: man.
* margin for hyphenation (hym): Manipulating Hyphenation.
* margin glyph (mc): Miscellaneous.
* margin, bottom: Page Layout.
* margin, left (po): Line Layout.
* margin, top: Page Layout.
* mark, high-water, register (.h): Diversions.
* marking vertical page location (mk): Page Motions.
* maximum values of Roman numerals: Assigning Formats.
* mdoc macros: mdoc.
* me macro package: me.
* measurement unit: Measurements.
* measurements: Measurements.
* measurements, specifying safely: Default Units.
* minimum values of Roman numerals: Assigning Formats.
* minor version number register (.y): Built-in Registers.
* minutes, current time (minutes): Built-in Registers.
* mm macro package: mm.
* mode for constant glyph space (cs): Artificial Fonts.
* mode, compatibility: Implementation Differences.
* mode, copy-in: Copy-in Mode.
* mode, copy-in, and write requests: I/O.
* mode, fill <1>: Warnings.
* mode, fill <2>: Manipulating Filling and Adjusting.
* mode, fill: Implicit Line Breaks.
* mode, fill (fi): Manipulating Filling and Adjusting.
* mode, fill, and \c: Line Control.
* mode, line-tabs: Tabs and Fields.
* mode, no-fill (nf): Manipulating Filling and Adjusting.
* mode, no-fill, and \c: Line Control.
* mode, no-space (ns): Manipulating Spacing.
* mode, nroff: Troff and Nroff Mode.
* mode, safer <1>: I/O.
* mode, safer <2>: Macro Directories.
* mode, safer: Groff Options.
* mode, troff: Troff and Nroff Mode.
* mode, unsafe <1>: I/O.
* mode, unsafe <2>: Macro Directories.
* mode, unsafe: Groff Options.
* month of the year register (mo): Built-in Registers.
* motion operators: Expressions.
* motion, horizontal (\h): Page Motions.
* motion, vertical (\v): Page Motions.
* motions, page: Page Motions.
* mounting font (fp): Font Positions.
* ms macros: ms.
* ms macros, accent marks: ms Strings and Special Characters.
* ms macros, body text: ms Body Text.
* ms macros, cover page: ms Cover Page Macros.
* ms macros, creating table of contents: ms TOC.
* ms macros, differences from AT&T: Differences from AT&T ms.
* ms macros, displays: ms Displays and Keeps.
* ms macros, document control registers: ms Document Control Registers.
* ms macros, equations: ms Insertions.
* ms macros, figures: ms Insertions.
* ms macros, footers: ms Headers and Footers.
* ms macros, footnotes: ms Footnotes.
* ms macros, general structure: General ms Structure.
* ms macros, headers: ms Headers and Footers.
* ms macros, headings: Headings in ms.
* ms macros, highlighting: Highlighting in ms.
* ms macros, keeps: ms Displays and Keeps.
* ms macros, lists: Lists in ms.
* ms macros, margins: ms Margins.
* ms macros, multiple columns: ms Multiple Columns.
* ms macros, nested lists: Lists in ms.
* ms macros, page layout: ms Page Layout.
* ms macros, paragraph handling: Paragraphs in ms.
* ms macros, references: ms Insertions.
* ms macros, special characters: ms Strings and Special Characters.
* ms macros, strings: ms Strings and Special Characters.
* ms macros, tables: ms Insertions.
* multi-file documents: Debugging.
* multi-line strings: Strings.
* multi-page table, example markup [ms]: Example multi-page table.
* multiple columns [ms]: ms Multiple Columns.
* n unit: Measurements.
* name space, common, of macros, diversions, and strings: Strings.
* named character (\C): Using Symbols.
* names, long: Implementation Differences.
* ne request, and the .trunc register: Page Location Traps.
* ne request, comparison with sv: Page Control.
* negating register values: Setting Registers.
* nested assignments: Interpolating Registers.
* nested diversions: Diversions.
* nested lists [ms]: Lists in ms.
* new page (bp) <1>: Page Control.
* new page (bp): Basics.
* newline character <1>: Escapes.
* newline character: Identifiers.
* newline character, and translations: Character Translations.
* newline character, in strings, escaping: Strings.
* newline, final, stripping in diversions: Strings.
* next file, processing (nx): I/O.
* next free font position register (.fp): Font Positions.
* nf request, causing implicit linebreak: Manipulating Filling and Adjusting.
* nl register, and .d: Diversions.
* nl register, difference to .h: Diversions.
* nm request, using + and -: Expressions.
* no-break control character ('): Requests.
* no-break control character, changing (c2): Character Translations.
* no-fill mode (nf): Manipulating Filling and Adjusting.
* no-fill mode, and \c: Line Control.
* no-space mode (ns): Manipulating Spacing.
* node, output: Gtroff Internals.
* nr request, and warnings: Warnings.
* nr request, using + and -: Expressions.
* nroff mode: Troff and Nroff Mode.
* nroff, the program: History.
* number of arguments register (.$): Parameters.
* number register, creating alias (aln): Setting Registers.
* number register, removing (rr): Setting Registers.
* number register, renaming (rnn): Setting Registers.
* number registers, dumping (pnr): Debugging.
* number, input line, setting (lf): Debugging.
* number, page (pn): Page Layout.
* numbered glyph (\N) <1>: Using Symbols.
* numbered glyph (\N): Character Translations.
* numbered list, example markup [ms]: Lists in ms.
* numbers, and delimiters: Escapes.
* numbers, line, printing (nm): Miscellaneous.
* numerals, Roman: Assigning Formats.
* numeric expression, valid: Expressions.
* offset, page (po): Line Layout.
* open request, and safer mode: Groff Options.
* opena request, and safer mode: Groff Options.
* opening file (open): I/O.
* operator, scaling: Expressions.
* operators, arithmetic: Expressions.
* operators, as delimiters: Escapes.
* operators, comparison: Expressions.
* operators, extremum (>?, <?): Expressions.
* operators, logical: Expressions.
* operators, motion: Expressions.
* operators, unary: Expressions.
* options: Groff Options.
* order of evaluation in expressions: Expressions.
* orphan lines, preventing with ne: Page Control.
* os request, and no-space mode: Page Control.
* output and input requests: I/O.
* output device name string register (.T) <1>: Built-in Registers.
* output device name string register (.T): Groff Options.
* output device usage number register (.T): Groff Options.
* output devices <1>: Output Devices.
* output devices: Output device intro.
* output glyphs, and input characters,compatibility with AT&T troff: Implementation Differences.
* output line number register (ln): Built-in Registers.
* output line, continuation (\c): Line Control.
* output line, horizontal position, register (.k): Page Motions.
* output node: Gtroff Internals.
* output request, and \!: Diversions.
* output, flush (fl): Debugging.
* output, gtroff: gtroff Output.
* output, intermediate: gtroff Output.
* output, suppressing (\O): Suppressing output.
* output, transparent (\!, \?): Diversions.
* output, transparent (cf, trf): I/O.
* output, transparent, incompatibilities with AT&T troff: Implementation Differences.
* output, troff: gtroff Output.
* overlapping characters: Using Symbols.
* overstriking glyphs (\o): Page Motions.
* P unit: Measurements.
* p unit: Measurements.
* packages, macros: Macro Packages.
* padding character, for fields (fc): Fields.
* page break, conditional (ne): Page Control.
* page control: Page Control.
* page footers: Page Location Traps.
* page headers: Page Location Traps.
* page layout: Page Layout.
* page layout [ms]: ms Page Layout.
* page length (pl): Page Layout.
* page length register (.p): Page Layout.
* page location traps: Page Location Traps.
* page location, vertical, marking (mk): Page Motions.
* page location, vertical, returning to marked (rt): Page Motions.
* page motions: Page Motions.
* page number (pn): Page Layout.
* page number character (%): Page Layout.
* page number character, changing (pc): Page Layout.
* page number register (%): Page Layout.
* page offset (po): Line Layout.
* page, new (bp): Page Control.
* paper formats: Paper Formats.
* paragraphs: Paragraphs.
* parameters: Parameters.
* parentheses: Expressions.
* path, for font files: Font Directories.
* path, for tmac files: Macro Directories.
* patterns for hyphenation (hpf): Manipulating Hyphenation.
* pi request, and groff: I/O.
* pi request, and safer mode: Groff Options.
* pic, the program: gpic.
* pica unit (P): Measurements.
* pile, glyph (\b): Drawing Requests.
* pl request, using + and -: Expressions.
* planting a trap: Traps.
* platform-specific directory: Macro Directories.
* pn request, using + and -: Expressions.
* po request, using + and -: Expressions.
* point size registers (.s, .ps): Changing Type Sizes.
* point size registers, last-requested (.psr, .sr): Fractional Type Sizes.
* point sizes, changing (ps, \s): Changing Type Sizes.
* point sizes, fractional <1>: Implementation Differences.
* point sizes, fractional: Fractional Type Sizes.
* point unit (p): Measurements.
* polygon, drawing (\D'p ...'): Drawing Requests.
* polygon, solid, drawing (\D'P ...'): Drawing Requests.
* position of lowest text line (.h): Diversions.
* position, absolute, operator (|): Expressions.
* position, horizontal input line, saving (\k): Page Motions.
* position, horizontal, in input line, register (hp): Page Motions.
* position, horizontal, in output line, register (.k): Page Motions.
* position, vertical, in diversion, register (.d): Diversions.
* positions, font: Font Positions.
* post-vertical line spacing: Changing Type Sizes.
* post-vertical line spacing register (.pvs): Changing Type Sizes.
* post-vertical line spacing, changing (pvs): Changing Type Sizes.
* postprocessor access: Postprocessor Access.
* postprocessors: Output device intro.
* PostScript fonts: Font Families.
* PostScript, bounding box: Miscellaneous.
* PostScript, embedding: Embedding PostScript.
* prefix, for commands: Environment.
* preprocessor, calling convention: Preprocessors in man pages.
* preprocessors <1>: Preprocessors.
* preprocessors: Preprocessor Intro.
* previous font (ft, \f[], \fP): Changing Fonts.
* print current page register (.P): Groff Options.
* printing backslash (\\, \e, \E, \[rs]) <1>: Implementation Differences.
* printing backslash (\\, \e, \E, \[rs]): Escapes.
* printing line numbers (nm): Miscellaneous.
* printing to stderr (tm, tm1, tmc): Debugging.
* printing, zero-width (\z, \Z): Page Motions.
* process ID of gtroff register ($$): Built-in Registers.
* processing next file (nx): I/O.
* properties of characters (cflags): Using Symbols.
* properties of glyphs (cflags): Using Symbols.
* ps request, and constant glyph space mode: Artificial Fonts.
* ps request, incompatibilities with AT&T troff: Implementation Differences.
* ps request, using + and -: Expressions.
* ps request, with fractional type sizes: Fractional Type Sizes.
* pso request, and safer mode: Groff Options.
* pvs request, using + and -: Expressions.
* quotes, major: Displays.
* quotes, trailing: Strings.
* ragged-left: Manipulating Filling and Adjusting.
* ragged-right: Manipulating Filling and Adjusting.
* rc request, and glyph definitions: Using Symbols.
* read-only register, changing format: Assigning Formats.
* reading from standard input (rd): I/O.
* recursive macros: while.
* refer, and macro names starting with [ or ]: Identifiers.
* refer, the program: grefer.
* reference, gtroff: gtroff Reference.
* references [ms]: ms Insertions.
* register, creating alias (aln): Setting Registers.
* register, format (\g): Assigning Formats.
* register, removing (rr): Setting Registers.
* register, renaming (rnn): Setting Registers.
* registers: Registers.
* registers specific to grohtml: grohtml specific registers and strings.
* registers, built-in: Built-in Registers.
* registers, interpolating (\n): Interpolating Registers.
* registers, setting (nr, \R): Setting Registers.
* removing diversion (rm): Strings.
* removing glyph definition (rchar): Using Symbols.
* removing macro (rm): Strings.
* removing number register (rr): Setting Registers.
* removing request (rm): Strings.
* removing string (rm): Strings.
* renaming diversion (rn): Strings.
* renaming macro (rn): Strings.
* renaming number register (rnn): Setting Registers.
* renaming request (rn): Strings.
* renaming string (rn): Strings.
* request arguments: Request Arguments.
* request, removing (rm): Strings.
* request, renaming (rn): Strings.
* request, undefined: Comments.
* requests: Requests.
* requests for drawing: Drawing Requests.
* requests for input and output: I/O.
* resolution, horizontal, register (.H): Built-in Registers.
* resolution, vertical, register (.V): Built-in Registers.
* returning to marked vertical page location (rt): Page Motions.
* revision number register (.Y): Built-in Registers.
* rf, the program: History.
* right-justifying (rj): Manipulating Filling and Adjusting.
* rj request, causing implicit linebreak: Manipulating Filling and Adjusting.
* rn glyph, and cflags: Using Symbols.
* roff, the program: History.
* roman glyph, correction after italic glyph (\/): Ligatures and Kerning.
* roman glyph, correction before italic glyph (\,): Ligatures and Kerning.
* Roman numerals: Assigning Formats.
* Roman numerals, maximum and minimum: Assigning Formats.
* rq glyph, and rq string [man]: Predefined man strings.
* rq glyph, at end of sentence <1>: Using Symbols.
* rq glyph, at end of sentence: Sentences.
* rt request, using + and -: Expressions.
* ru glyph, and cflags: Using Symbols.
* runoff, the program: History.
* s unit <1>: Fractional Type Sizes.
* s unit: Measurements.
* safer mode <1>: I/O.
* safer mode <2>: Macro Directories.
* safer mode: Groff Options.
* saving horizontal input line position (\k): Page Motions.
* scaling operator: Expressions.
* searching fonts: Font Directories.
* searching macro files: Macro Directories.
* searching macros: Macro Directories.
* seconds, current time (seconds): Built-in Registers.
* sentence space: Sentences.
* sentence space size register (.sss): Manipulating Filling and Adjusting.
* sentences: Sentences.
* setting diversion trap (dt): Diversion Traps.
* setting end-of-input trap (em): End-of-input Traps.
* setting input line number (lf): Debugging.
* setting input line trap (it): Input Line Traps.
* setting registers (nr, \R): Setting Registers.
* shading filled objects (\D'f ...'): Drawing Requests.
* shc request, and translations: Character Translations.
* site-specific directory <1>: Font Directories.
* site-specific directory: Macro Directories.
* size of sentence space register (.sss): Manipulating Filling and Adjusting.
* size of type: Sizes.
* size of word space register (.ss): Manipulating Filling and Adjusting.
* sizes: Sizes.
* sizes, fractional <1>: Implementation Differences.
* sizes, fractional: Fractional Type Sizes.
* slant, font, changing (\S): Artificial Fonts.
* soelim, the program: gsoelim.
* soft hyphen character, setting (shc): Manipulating Hyphenation.
* soft hyphen glyph (hy): Manipulating Hyphenation.
* solid circle, drawing (\D'C ...'): Drawing Requests.
* solid ellipse, drawing (\D'E ...'): Drawing Requests.
* solid polygon, drawing (\D'P ...'): Drawing Requests.
* sp request, and no-space mode: Manipulating Spacing.
* sp request, causing implicit linebreak: Manipulating Filling and Adjusting.
* space between sentences: Sentences.
* space between sentences register (.sss): Manipulating Filling and Adjusting.
* space between words register (.ss): Manipulating Filling and Adjusting.
* space character: Escapes.
* space character, zero width (\&) <1>: Drawing Requests.
* space character, zero width (\&) <2>: Ligatures and Kerning.
* space character, zero width (\&): Requests.
* space characters, in expressions: Expressions.
* space, horizontal (\h): Page Motions.
* space, horizontal, unformatting: Strings.
* space, unbreakable: Page Motions.
* space, vertical, unit (v): Measurements.
* space, width of a digit (\0): Page Motions.
* spaces with ds: Strings.
* spaces, leading and trailing: Filling and Adjusting.
* spacing: Basics.
* spacing, manipulating: Manipulating Spacing.
* spacing, vertical: Sizes.
* special characters <1>: Special Characters.
* special characters: Character Translations.
* special characters [ms]: ms Strings and Special Characters.
* special fonts <1>: Font File Format.
* special fonts <2>: Special Fonts.
* special fonts: Using Symbols.
* special fonts, emboldening: Artificial Fonts.
* special request, and font translations: Changing Fonts.
* spline, drawing (\D'~ ...'): Drawing Requests.
* springing a trap: Traps.
* stacking glyphs (\b): Drawing Requests.
* standard input, reading from (rd): I/O.
* stderr, printing to (tm, tm1, tmc): Debugging.
* stops, tabulator: Tab Stops.
* string arguments: Strings.
* string expansion (\*): Strings.
* string interpolation (\*): Strings.
* string, appending (as): Strings.
* string, creating alias (als): Strings.
* string, length of (length): Strings.
* string, removing (rm): Strings.
* string, renaming (rn): Strings.
* strings: Strings.
* strings [ms]: ms Strings and Special Characters.
* strings specific to grohtml: grohtml specific registers and strings.
* strings, multi-line: Strings.
* strings, shared name space with macros and diversions: Strings.
* stripping final newline in diversions: Strings.
* structuring source code of documents or macro packages: Requests.
* sty request, and changing fonts: Changing Fonts.
* sty request, and font positions: Font Positions.
* sty request, and font translations: Changing Fonts.
* styles, font: Font Families.
* substring (substring): Strings.
* suppressing output (\O): Suppressing output.
* sv request, and no-space mode: Page Control.
* switching environments (ev): Environments.
* sy request, and safer mode: Groff Options.
* symbol: Using Symbols.
* symbol table, dumping (pm): Debugging.
* symbol, defining (char): Using Symbols.
* symbols, using: Using Symbols.
* system() return value register (systat): I/O.
* tab character <1>: Escapes.
* tab character: Tab Stops.
* tab character, and translations: Character Translations.
* tab character, non-interpreted (\t): Tabs and Fields.
* tab repetition character (tc): Tabs and Fields.
* tab settings register (.tabs): Tabs and Fields.
* tab stops: Tab Stops.
* tab stops [man]: Miscellaneous man macros.
* tab stops, for TTY output devices: Tabs and Fields.
* tab, line-tabs mode: Tabs and Fields.
* table of contents <1>: Leaders.
* table of contents: Table of Contents.
* table of contents, creating [ms]: ms TOC.
* tables [ms]: ms Insertions.
* tabs, and fields: Tabs and Fields.
* tabs, before comments: Comments.
* tbl, the program: gtbl.
* text line, position of lowest (.h): Diversions.
* text, gtroff processing: Text.
* text, justifying: Manipulating Filling and Adjusting.
* text, justifying (rj): Manipulating Filling and Adjusting.
* thickness of lines (\D't ...'): Drawing Requests.
* three-part title (tl): Page Layout.
* ti request, causing implicit linebreak: Manipulating Filling and Adjusting.
* ti request, using + and -: Expressions.
* time, current: I/O.
* time, current, hours (hours): Built-in Registers.
* time, current, minutes (minutes): Built-in Registers.
* time, current, seconds (seconds): Built-in Registers.
* title line (tl): Page Layout.
* title line length register (.lt): Page Layout.
* title line, length (lt): Page Layout.
* title page, example markup: ms Cover Page Macros.
* titles: Page Layout.
* tkf request, and font styles: Font Families.
* tkf request, and font translations: Changing Fonts.
* tkf request, with fractional type sizes: Fractional Type Sizes.
* tl request, and mc: Miscellaneous.
* tmac, directory: Macro Directories.
* tmac, path: Macro Directories.
* TMPDIR, environment variable: Environment.
* token, input: Gtroff Internals.
* top margin: Page Layout.
* top-level diversion: Diversions.
* top-level diversion, and \!: Diversions.
* top-level diversion, and \?: Diversions.
* top-level diversion, and bp: Page Control.
* tr request, and glyph definitions: Using Symbols.
* tr request, and soft hyphen character: Manipulating Hyphenation.
* tr request, incompatibilities with AT&T troff: Implementation Differences.
* track kerning: Ligatures and Kerning.
* track kerning, activating (tkf): Ligatures and Kerning.
* trailing quotes: Strings.
* trailing spaces: Filling and Adjusting.
* translations of characters: Character Translations.
* transparent characters <1>: Using Symbols.
* transparent characters: Sentences.
* transparent output (\!, \?): Diversions.
* transparent output (cf, trf): I/O.
* transparent output, incompatibilities with AT&T troff: Implementation Differences.
* trap, changing location (ch): Page Location Traps.
* trap, distance, register (.t): Page Location Traps.
* trap, diversion, setting (dt): Diversion Traps.
* trap, end-of-input, setting (em): End-of-input Traps.
* trap, input line, setting (it): Input Line Traps.
* trap, planting: Traps.
* trap, springing: Traps.
* traps: Traps.
* traps, blank line: Blank Line Traps.
* traps, diversion: Diversion Traps.
* traps, dumping (ptr): Debugging.
* traps, end-of-input: End-of-input Traps.
* traps, input line: Input Line Traps.
* traps, input line, and interrupted lines (itc): Input Line Traps.
* traps, page location: Page Location Traps.
* trf request, and invalid characters: I/O.
* trf request, causing implicit linebreak: Manipulating Filling and Adjusting.
* trin request, and asciify: Diversions.
* troff mode: Troff and Nroff Mode.
* troff output: gtroff Output.
* truncated vertical space register (.trunc): Page Location Traps.
* tutorial for macro users: Tutorial for Macro Users.
* type size: Sizes.
* type size registers (.s, .ps): Changing Type Sizes.
* type sizes, changing (ps, \s): Changing Type Sizes.
* type sizes, fractional <1>: Implementation Differences.
* type sizes, fractional: Fractional Type Sizes.
* u unit: Measurements.
* uf request, and font styles: Font Families.
* ul glyph, and cflags: Using Symbols.
* ul request, and font translations: Changing Fonts.
* unary operators: Expressions.
* unbreakable space: Page Motions.
* undefined identifiers: Identifiers.
* undefined request: Comments.
* underline font (uf): Artificial Fonts.
* underlining (ul): Artificial Fonts.
* underlining, continuous (cu): Artificial Fonts.
* underscore glyph (\[ru]): Drawing Requests.
* unformatting diversions (asciify): Diversions.
* unformatting horizontal space: Strings.
* Unicode <1>: Using Symbols.
* Unicode: Identifiers.
* unit, c: Measurements.
* unit, f: Measurements.
* unit, f, and colors: Colors.
* unit, i: Measurements.
* unit, M: Measurements.
* unit, m: Measurements.
* unit, n: Measurements.
* unit, P: Measurements.
* unit, p: Measurements.
* unit, s <1>: Fractional Type Sizes.
* unit, s: Measurements.
* unit, u: Measurements.
* unit, v: Measurements.
* unit, z <1>: Fractional Type Sizes.
* unit, z: Measurements.
* units of measurement: Measurements.
* units, default: Default Units.
* unnamed glyphs: Using Symbols.
* unnamed glyphs, accessing with \N: Font File Format.
* unsafe mode <1>: I/O.
* unsafe mode <2>: Macro Directories.
* unsafe mode: Groff Options.
* user's macro tutorial: Tutorial for Macro Users.
* user's tutorial for macros: Tutorial for Macro Users.
* using symbols: Using Symbols.
* utf-8, encoding: Groff Options.
* v unit: Measurements.
* valid numeric expression: Expressions.
* value, incrementing without changing the register: Auto-increment.
* variables in environment: Environment.
* version number, major, register (.x): Built-in Registers.
* version number, minor, register (.y): Built-in Registers.
* vertical line drawing (\L): Drawing Requests.
* vertical line spacing register (.v): Changing Type Sizes.
* vertical line spacing, changing (vs): Changing Type Sizes.
* vertical line spacing, effective value: Changing Type Sizes.
* vertical motion (\v): Page Motions.
* vertical page location, marking (mk): Page Motions.
* vertical page location, returning to marked (rt): Page Motions.
* vertical position in diversion register (.d): Diversions.
* vertical position trap enable register (.vpt): Page Location Traps.
* vertical position traps, enabling (vpt): Page Location Traps.
* vertical resolution register (.V): Built-in Registers.
* vertical space unit (v): Measurements.
* vertical spacing: Sizes.
* warnings <1>: Warnings.
* warnings: Debugging.
* warnings, level (warn): Debugging.
* what is groff?: What Is groff?.
* while: while.
* while request, and the ! operator: Expressions.
* while request, confusing with br: while.
* while request, operators to use with: Operators in Conditionals.
* whitespace characters: Identifiers.
* width escape (\w): Page Motions.
* word space size register (.ss): Manipulating Filling and Adjusting.
* writing macros: Writing Macros.
* writing to file (write): I/O.
* year, current, register (year, yr): Built-in Registers.
* z unit <1>: Fractional Type Sizes.
* z unit: Measurements.
* zero width space character (\&) <1>: Drawing Requests.
* zero width space character (\&) <2>: Ligatures and Kerning.
* zero width space character (\&): Requests.
* zero-width printing (\z, \Z): Page Motions.
* |, and page motion: Expressions.