    Copyright (C) 1992-2018 Free Software Foundation, Inc.

    Copying and distribution of this file, with or without modification,
    are permitted in any medium without royalty provided the copyright
    notice and this notice are preserved.

This file describes recent user-visible changes in groff.  Bug fixes are not
described.  There are more details in the man and info pages.


VERSION 1.22.4
==============

Troff
-----

o The `hy' request has been extended.  Value 16 enables hyphenation before
  the last character, and value 32 enables hyphenation after the first
  character.


PDFPIC
------

o PDFPIC has been corrected so the behaviour is the same whether you use the
  PostScript or PDF drivers.  However, this means that any documents which
  were written using the old behaviour will not be rendered correctly if
  using the PDF driver with the new version.

  The change would mean that documents which relied on the previous
  behaviour are likely to have a gap underneath the image which was not
  there before.  If you see this effect there are three ways you can restore
  the previous behaviour:

  Add the line ".nr PDFPIC_NOSPACE 1" to the document before the first call
  to .PDFPIC.

  If it is just a single document which exhibits this behaviour you can run
  groff adding "-rPDFPIC_NOSPACE=1" to the command line.

  If you have many documents which rely on the previous behaviour you can
  set an environment variable "export GROFF_PDFPIC_NOSPACE=1" which will
  restore the previous behaviour for all runs.

  Note that this change has no effect if you were using .PDFPIC with the
  PostScript driver--only if you used it with the PDF driver.


Gropdf
------

o Type 1 font loading is fixed to handle newer Ghostscript versions.

o Handling of glyphs above position 255 is improved to allow many more
  glyphs to be used.

o New macros .pdftransition and .pdfpause are introduced to allow creation
  of presentation slides.  Partially backward-compatible with present.tmac,
  specifically the PAUSE, BLOCKS and BLOCKE commands.  Supports all the
  transition types introduced in PDF v1.5 (see the gropdf man page).


Miscellaneous
-------------

o A new 'configure' option --with-compatibility-wrappers controls how groff
  compatibility wrappers for vendor-provided non-GNU macro sets are
  installed (see ./configure --help).

o eqn2graph, grap2graph, and pic2graph now attempt to adapt to very old
  installed versions of the ImageMagick and GraphicsMagick programs
  "convert".  They search the output of convert's "-help" option, and use
  "-trim" if that string is found; otherwise, the old "-crop 0x0" method
  (which produces incompatible results on versions that _do_ support
  "-trim") is used.  The programs emit a warning to standard error if the
  search fails and the old method is used.

o eqn2graph no longer supports the "-unsafe" option.  It did nothing.

o groffer now supports the output of XHTML.  Use the "--xhtml" or
  "--mode=xhtml" command-line options to generate it.

o Much work has been done, and is ongoing, to make groff's man pages better
  examples for man page writers to follow.  groff_man(7) itself has been
  expanded and largely rewritten to more precisely document the macro
  package's behavior and to be more helpful and accessible to man page
  writers who may never read any other groff documentation.


VERSION 1.22.3
==============

Gxditview
---------

o X11 resources for `gxditview', which were previously installed in
  /usr/X11/lib/X11/app-defaults no matter which `prefix' was set, are
  now installed in appresdir=$prefix/lib/X11/app-defaults.  If
  `appresdir' is not a standard X11 resource directory, the environment
  variable XFILESEARCHPATH should be set to this path.  The standard
  default directories depends on the system `libXt'.  Common directories
  include:
 
   /usr/lib/X11/app-defaults
   /usr/share/X11/app-defaults
   /etc/X11/app-defaults

  Note that if the option `--with-appresdir' is passed to `configure',
  the `prefix' will not be added to `appresdir'.


Glilypond
---------

o This new preprocessor (contributed by Bernd Warken) allows embedding of
  code for GNU LilyPond (http://www.lilypond.org), a music typesetter.  The
  data gets automatically processed and embedded as EPS images.


Gperl
-----

o Bernd Warken contributed a new preprocessor to handle Perl code that can
  be evaluated and then processed by groff.


Gpinyin
-------

o Another preprocessor from Bernd Warken to pretty-print Pinyin syllables
  like `guo2wang2' as `guówáng'.


Pdfroff
-------

o The pdfroff utility script now activates its `--no-toc-relocation' option
  by default, unless a request similar to:

     .if !\n[PHASE] .tm pdfroff-option:set toc_relocation=enabled

  is invoked during input file processing; (`.if !\n[PHASE] ...' ensures
  that the effect of the `.tm' request is restricted to the document setup
  phase of processing, as pdfroff sets it to 1 or 2 in the output phase,
  but leaves it unset in the setup phase).

  The bundled `spdf.tmac' macro package, which implicitly activates
  `-mpdfmark' for `ms' macro users, ensures that TOC relocation is
  appropriately enabled, when the `.TC' macro is invoked.


Macro Packages
--------------

o New default values for hyphenation.  The previous values were too strict,
  suppressing some hyphenation points unnecessarily.

o The -mom macro package now has full support for eqn, pic, and tbl, as well
  as captioning and labelling of PDF images and preprocessor output.  Lists
  of Figures, Equations, and Tables can now be autogenerated.  PDF_IMAGE has
  a new FRAME option.

o A French introduction to the -me macro package has been added (file
  `meintro_fr.me').

o In -mdoc, command %C is now available, providing a city or place
  reference.


VERSION 1.22.2
==============

Tbl
---

o The character `#' can now be used as an eqn delimiter within tables.


Eqn
---

o A GNU extension

    delim on

  has been added to reactivate delimiters which have been disabled with
  `delim off'.


VERSION 1.22.1
==============

(There was no release 1.22.)

Groff
-----

o A new option `-j' has been added to call the `chem' preprocessor.

Tbl
---

o Improved line numbering support.

Macro Packages
--------------

o Support for the `refer' preprocessor has been added to the -mm macro
  package.

o In -me, the `TH' macro was changed for compatibility with line number
  support in tables.

  `bl' now works inside of blocks.

  The behaviour of centered blocks has been improved.

  Line numbering support has been improved.

o The -mom macro package has reached version 2.0, focusing on PDF output
  with gropdf (using the new `pdfmom' wrapper script).  See the file
  `version-2.html' of the -mom documentation for a list of the many changes.

o Some generic Unicode fallback characters (mainly Roman numerals) have been
  added.

Gropdf
------

o A new driver for generating PDF output directly, contributed by Deri James
  <deri@chuzzlewit.myzen.co.uk>.  Note that this driver is written in Perl,
  thus you need a working Perl installation to run this output device.

Pdfmom
------

o A new wrapper around groff that facilitates the production of PDF
  documents from files formatted with the -mom macros.


VERSION 1.21
============

Troff
-----

o The new `lsm' request specifies a macro to be invoked when leading spaces
  in an input line are encountered (which are removed then).  Number
  registers `lsn' and `lss' hold the number of removed leading spaces and
  the corresponding horizontal space, respectively.

o There is a new warning category `file', enabled by default.  The `mso'
  request emits warnings in this category when the requested macro file does
  not exist.

o The new `class' request assigns a short name to a set of characters
  which can be referred to in the `cflags' request.  This is especially
  useful to control line-breaking and hyphenation rules in CJK languages.

o Three new values for the `cflags' request have been added, which are
  needed for proper CJK support.

    128  prohibit before but allow break after character
    256  prohibit after but allow break before character
    512  allow break before and after character

Tbl
---

o A new global option `nowarn' suppresses warnings if tables are longer than
  the current line width.

Afmtodit
--------

o New option `-o' to specify the name of the output file.

Macro Packages
--------------

o A new macro `%U' has been added to the mdoc package to indicate a URL
  reference within an .Rs/.Re environment.

o Rudimentary support for the Japanese script has been added, most suitable
  for man page handling as output by grotty.  The file `ja.tmac' contains
  the necessary setup to allow line breaks before and after CJK characters
  (with proper exceptions).  Note, however, that no inter-character spacing
  is implemented yet -- this usually causes many warnings about bad line
  breaks.


VERSION 1.20.1
==============

A packaging error made it necessary to publish this release.  No
user-visible changes.


VERSION 1.20
============

Groff
-----

o XHTML support has been added to grohtml and can be specified by
  -Txhtml.  This option also utilizes the MathML capability of
  eqn and combines the outputs of both in the final XHTML file.
  Users can also specify the `-P-V' option together with `-Txhtml'
  in groff.  This has the effect of creating an XHTML validator
  button at the bottom of each page.

o Some options have been added to control a new preprocessor,
  `preconv' (see below): `-k' activates it, `-K' sets the input
  encoding, and `-D' sets the default encoding.

o A new environment variable `GROFF_ENCODING' sets the encoding
  of input files; it implies command option `-k'.

Troff
-----

o Two new requests `device' and `devicem' have been added which are
  equivalents to the \X and \Y escapes, respectively.

o A new read-only number register `.br' is available which is set to 1
  if a macro is called as .foo and to 0 if called as 'foo.  This allows to
  reliably modify requests.

    .als bp@orig bp
    .de bp
    .  tm before bp
    .  ie \\n[.br] .bp@orig
    .  el 'bp@orig
    .  tm after bp
    ..

o A new request `fzoom' has been added to adjust the optical size of a
  font in relation to the others.  The zoom factor is given in integer
  multiples of 1/1000th.  In the following example, the CR font is
  magnified by 10% (the zoom factor is 1.1).

    .fam P
    .fzoom CR 1100
    .ps 12
    Palatino and \f[CR]Courier\f[]

  The new number register `.zoom' holds the zoom value of the current font,
  in multiples of 1/1000th.

o The `cflags' request has been extended with a new flag value 64, to be
  used in combination with values 2 (break before character) and 4 (break
  after character).  If set, the hyphenation codes of the surrounding
  characters are ignored.

o A new debugging request, `pev', has been added to print all of the current
  known environments to stderr.  It first prints the state of the current
  environment, then iterates through all of the known environments, printing
  each except the one that is current.

o A new escape `\$^' has been added.  It represents the parameters of a
  macro as if they were an argument to the `ds' request.  This is used by
  `trace.tmac'.

o A new read-only number register `.O' is available which returns the
  current suppression level as set by the `\O' escape.

o The space width emitted by the `\|' and `\^' escape sequences can be
  controlled on a per-font basis.  If there is a glyph named `\|' or `\^',
  respectively (note the leading backslash), defined in the current font
  file, use this glyph's width instead of the default value.

  This behaviour is not new, but hasn't been documented before.

Nroff
-----

o Two new command line options `-w' and `-W' are accepted and passed to
  groff to enable and disable warning messages, respectively.

Preconv
-------

o This is a new preprocessor to convert various input encodings to something
  groff understands (this is, ASCII and \[uXXXX] entities, with `XXXX' a
  hexadecimal number with 4 to 6 digits, representing a Unicode input code).
  Normally, preconv should be invoked with options `-k' and `-K' of groff.
  See the preconv man page for details.

Pic
---

o int(x) now really behaves as documented: It truncates the non-integer part
  of x, this is, it rounds towards zero and not towards the next integer
  less than or equal to x.

o Pic now supports up to 32 macro arguments (and up to 16 on EBCDIC
  platforms).

o Heinz-Jürgen Örtel contributed code for two new keywords, `xslanted' and
  `yslanted', which can change the shape of boxes into arbitrary
  parallelograms.

Tbl
---

o Latest versions of DWB tbl introduced an `x' column specifier for a single
  column expanded to the line width.  GNU tbl has now been extended to
  support even multiple `x' specifiers within a table.

o To avoid collision with the new `x' specifier, a block formatting macro
  must now be selected with specifier letter `m'.

Eqn
---

o Eric S. Raymond has added a new device type to eqn, MathML.  When
  -TMathML is enabled, eqn now emits MathML formula markup rather than
  groff commands.  The new groff -Txhtml device uses this.

Chem
----

o The preprocessor `chem' was added.  `chem' is a roff language to generate
  chemical structure diagrams.  It generates `pic' output.

Grops
-----

o The PS font definition files have been regenerated with newer AFM versions
  from Adobe's 35 core fonts as present in most Level 2 PS printers.  The
  changes are minor (most notably, the addition of the `Euro' glyph and an
  extended set of kerning values).

  For backwards compatibility, the old set of font definition files is still
  available; for details please read the man page of grops.

Grotty
------

o \D'p...' is now supported if the polygon consists entirely of horizontal
   and vertical lines.

Grohtml
-------

o XHTML support has been added.

o New command line option `-V' (to be used in XHTML mode) to produce an
  XHTML validator button.

o New command line option `-y' to produce a right-justified groff signature
  at the end of the document (in combination with option `-V').

Gxditview
---------

o Support for keyboard navigation has been improved.

o Similar to other X11 applications, there are now two resource files,
  `GXditview' and `GXditview-color'.

Groffer
-------

o `groffer' version 1.* exists now in a shell and a Perl version.

Afmtodit
--------

o New option `-c' to output more font information as comments.

o New option `-k' to suppress output of kerning data.

o New option `-f NAME' to set the internal name of the groff font.

Macro Packages
--------------

o Joachim Walsdorff contributed the `hdtbl' package for the generation of
  tables, using a syntax very similar to the HTML table model.  For
  example, a table with two cells and two rows looks like this:

    .TBL cols=2
    .  TR .TD 1*1 .TD 1*2
    .  TR .TD 2*1 .TD 2*2
    .ETB

  Here the same table using a more expanded syntax:

    .TBL cols=2
    .  TR
    .    TD 1*1
    .    TD 1*2
    .  TR
    .    TD 2*1
    .    TD 2*2
    .ETB

  Tables can be nested; `hdtbl' works without a preprocessor so that the
  full capability of groff's macro engine is available.

  This package currently works with `-Tps' only.

o -mandoc now supports multiple man pages (in either man or mdoc format).

o Fabrice Ménard contributed locales support.  In particular, it is now
  possible to get French localization of the main macro packages (-ms, -mm,
  -me, and -mom, but not -man and -mdoc which are localized differently) by
  appending `-mfr' to the list of macro packages.  Example:

    groff -ms -mfr foo > foo.ps

  Note that latin-9 input encoding is used for French (to support the `oe'
  ligature).

o Swedish macro localization (with `-msv') has been added.

o German macro localization (with `-mde' and `-mden' for traditional and
  new orthography, respectively) has been added.

o Czech macro localization (with `-mcs') has been added.

  Note that latin-2 input encoding is used for Czech.

o A new macro `Dx' has been added to the mdoc package which identifies the
  DragonFly OS.

o If mdoc is used to print multiple man pages (together with the -rcR=0
  command line option), each man page now starts a new page.

o -mtrace has been considerably improved, now showing number and string
  register assignments, among other things.  See the groff_trace man page
  for details.

o The PSPIC macro now works with all devices (producing a hollow
  rectangle on devices which don't support inclusion of PS images) and
  is loaded in troffrc at start-up.

o A new auxiliary macro package `62bit' has been added which provides some
  macros for adding, multiplying, and dividing signed 62bit integers (mainly
  to handle normal groff number operations without risking overflow errors).

o For -ms, Eric S. Raymond contributed support for ancient Bell Labs
  localisms `.SC', `.UC', `.P1', and `.P2'.  The latter three are enabled
  only after .SC is called.

o A new string, `SN-STYLE', has been added to the ms macros, controlling
  the formatting of section numbers in headings defined by `.NH'.

o The new macro package `ptx' provides a template definition for the `.xx'
  macro as needed by GNU ptx (for creating permuted indices).


VERSION 1.19.2
==============

Troff
-----

o Analogously to the .ft and \f pair, two new requests `gcolor' and
  `fcolor' (which pair with \m and \M, respectively) have been added to
  set the glyph and background colours.

o A new read-only, string-valued register `.sty' returns the name of the
  current style.

o Two new conditional operators `F <name>' and `S <name>' have been added.
  `F' is true if a font <name> exists.  `S' is true if a style <name> has
  been registered.

o Cyrillic characters have been added to the `utf8' and `html' output
  devices.

Pic
---

o The `by' argument in a `for' loop can now be negative if it is additive.
  For the multiplicative case, it must be greater than zero.

Eqn
---

o The following keywords aren't new but haven't been documented previously:

    undef NAME    (to undefine a macro)
    copy  "FILE"  (a synonym for `include')
    space n       (to modify the vertical spacing before and after
                   an equation)

o The following macros aren't new but haven't been documented previously:

    Alpha, ..., Omega   (the same as `ALPHA', ..., `OMEGA')
    ldots               (three dots on the base line)
    dollar              (a dollar glyph)

o The following keywords have been extended.  Again, this isn't new but
  hasn't been documented previously:

    col n { ... }
    lcol n { ... }
    rcol n { ... }
    ccol n { ... }
    pile n { ... }
    lpile n { ... }
    rpile n { ... }
    cpile n { ... }   (set vertical spacing between rows to N)

Grohtml
-------

o This device driver has been raised to beta stage; its set of tags should
  be stable now.

o New command line option `-s' to set the base point size.

o New command line option `-S' to set the split level while generating
  multiple files.

Grotty
------

o Experimental support for zero-width and double-width characters.

Gxditview
---------

o On platforms which have the X Window System this program is now built and
  installed automatically.

Xtotroff
--------

o This program to create font definition files for xditview isn't new but
  hasn't been installed previously.

Groffer
-------

o A security problem (reported as CAN-2004-0969) has been fixed.

Gdiffmk
-------

o A new script contributed by Mike Bianchi.  It compares two groff, nroff,
  or troff documents and creates an output with added margin characters
  (using `.mc') to indicate the differences.

Pdfroff
-------

o A new wrapper script contributed by Keith Marshall to easily create PDF
  documents with groff.

Macro packages
--------------

o ms.tmac

  . Support for fractional point sizes: A value for the `PS', `VS', `FPS',
    and `VPS' register larger than or equal to 1000 is always divided by
    1000.  For example, `.nr PS 10250' sets the document's font size to
    10.25 points.

  . The `Ds' and `De' macros provided in ms since groff version 1.19 have
    been removed; the equivalent `DS' and `DE' macros should be used
    instead.  X11 documents which actually use `Ds' and `De' always load a
    specific macro file from the X11 distribution (`macros.t') which
    provides proper definitions for the two macros.

  . The following registers have been added for improving layout control:

    PORPHANS
      Defines number of lines following `LP', `PP', `QP', `IP' or `XP' which
      must be kept together, before any automatic page break.

    HORPHANS
      Sets number of lines of following paragraph which must be kept with a
      heading, defined by `NH' or `SH', before any automatic page break.

    GROWPS
      Sets the first level of heading (set with `NH') which keeps the
      same point size as body text.

    PSINCR
      Sets the point size increment for each level of heading (set with
      `NH'), below the threshold level set by `GROWPS'; e.g., if
      \n[PS] = 10, \n[GROWPS] = 3 and \n[PSINCR] = 2.0p, then `.NH 1'
      produces 14pt headings, `.NH 2' produces 12pt, and all other
      levels remain at 10pt (because \n[PS] = 10).

  . The `SH' macro now accepts a numeric argument, to make heading size
    match that of `NH' with same argument value when the `GROWPS'/`PSINCR'
    feature is enabled.

  Please refer to the documentation of the ms package for other, minor
  improvements.

o me.tmac

  The section type set with the `++' request is available in the `_M'
  register.  This isn't new but hasn't been documented before.

o www.tmac

  The `HR' macro no longer causes an empty line for non-HTML devices.

  A new macro `HEAD' has been added to directly add data to the
  <head>...</head> block.

  New macros `OLS' and `OLE' to start and end an ordered list.

  New macros `DLS' and `DLE' to start and end a definition list.

Pdfmark
-------

o A new macro package contributed by Keith Marshall which implements PDF
  marks.  This is in alpha stage currently.

Miscellaneous
-------------

o Two new keywords to the DESC file have been added which are needed for
  grohtml: `image_generator' and `unscaled_charwidths'.  The former gives
  the name of the program which creates PNG images, and the latter makes
  troff always use unscaled character widths.


VERSION 1.19.1
==============

Groff
-----

o The argument of the command line option `-I' is now also passed to troff
  and grops, specifying a directory to search for files on the command line,
  files named in `so' and `psbb' requests, and files named in \X'ps: file'
  and \X'ps: import' escapes.

o If option `-V' is used more than once, the commands are both printed
  on standard error and run.

Troff
-----

o Two new read-only, string-valued registers `.m' and `.M' return the
  name of the current drawing and background color, respectively.

o New read-only register `.U' which is set to 1 if in safer mode and set
  to 0 if in unsafe mode.

o An input encoding file for latin-5 (a.k.a. ISO 8859-9) has been added.
  Example use:

    groff -Tdvi -mlatin5 my_file > my_file.dvi

  Note that some output devices don't support all glyphs of this encoding.

o If the `return' request is called with an argument, it exits twice,
  namely the current macro and the macro one level higher.  This is
  used to define a wrapper macro for `return' in trace.tmac.

o For completeness, two new requests have been added: `dei1' and `ami1'.
  They are equivalent to `dei' and `ami', respectively, but the macros
  are executed with compatibility mode off (similar to `de1' and `am1').

o New command line option `-I' to specify a directory for files (both
  those on the command line and those named in `psbb' requests).  This is
  also handled by the groff wrapper program.

o Since version 1.19 you can say `.vs 0'.  Older versions emit a warning
  and convert this to `.vs \n[.V]'.

  This hasn't been documented properly.  Note that `.vs 0' isn't saved in a
  diversion since it doesn't result in vertical motion.

Pic
---

o Dashed and dotted ellipses have been implemented.

Tbl
---

o New specifier `x' to make tbl call a user-defined macro on a table
  cell.  Patch by Heinz-Jürgen Oertel <hj.oertel@surfeu.de>.

Grap2graph
----------

o A new script contributed by Eric S. Raymond <esr@thyrsus.com>.  It
  converts a grap diagram into a cropped image.  Since it uses gs and the
  PNM library, virtually all graphics formats are available for output.
  [Note that the grap program itself isn't part of the groff package;
  see the file MORE.STUFF how to obtain grap.]

Grohtml
-------

o New option `-j' to emit output split into multiple files.

Grops
-----

o New command line option `-I' to specify a directory to search for files
  on the command line and files named in \X'ps: import' and \X'ps: file'
  escapes.  This is also handled by the groff wrapper program.

o The default value for the `broken' keyword in the DESC file is now 0.

Grolj4
------

o A new man page `lj4_font(5)' documents how fonts are accessed with
  grolj4.

o The built-in fonts for LJ4 and newer PCL 5 devices have been completely
  revised, mainly to access as much glyphs as possible.  The provided
  metric files should be compatible with recent PCL 5 printers also.
  Additionally, font description files have been added for the Arial and
  Times New Roman family, the MS symbol, and Wingdings fonts.

Afmtodit
--------

o New option `-x' to prevent use of built-in Adobe Glyph List.

Hpftodit
--------

o Completely revised to handle HP TrueType metric files also.  See the
  hpftodit manual page for more details.

Groffer
-------

o This version is a rewrite of groffer in many parts, but it is kept in
  the old single script style.

  New options: --text, --mode text, --tty-viewer, --X, --mode X,
  --X-viewer, --html, --mode html, --html-view, --apropos-data,
  --apropos-devel, --apropos-progs.

  New documentation file: README_SH.

  Enhancement of the configuration files and the `apropos' handling.

Macro Packages
--------------

o www.tmac: New macro `JOBNAME' to split output into multiple files.

o In mdoc, multiple calls to `.Lb' are now supported in the LIBRARY
  section.


VERSION 1.19
============

Troff
-----

o Input encoding files for latin-9 (a.k.a. latin-0 and ISO 8859-15) and
  latin-2 (ISO 8859-2) have been added.  Example use:

    groff -Tdvi -mlatin9 my_file > my_file.dvi

  You still need proper fonts with the necessary glyphs.  Out of the box,
  the groff package supports latin-9 only for -Tps, -Tdvi, and -Tutf8,
  and latin-2 only for -Tdvi and -Tutf8.

o Composite glyphs are now supported.  To do this, a subset of the Adobe
  Glyph List (AGL) Algorithm as described in

    http://partners.adobe.com/public/developer/opentype/index_glyph.html

  is used to construct glyph names based on Unicode character codes.  The
  existing groff glyph names are frozen; no glyph names which can't be
  constructed algorithmically will be added in the future.

  The \[...] escape sequence has been extended to specify multiple glyph
  components.  Example:

    \[A ho]

  this accesses a glyph with the name `u0041_0328'.

  Some groff glyphs which are useful as composites map to `wrong' Unicode
  code points.  For example, `ho' maps to U+02DB which is a spacing
  ogonek, whereas a non-spacing ogonek U+0328 is needed for composite
  glyphs.  The new request

    .composite from to

  changes the mapping while a composite glyph name is constructed.
  To make \[A ho] yield the expected result,

    .composite ho u0328

  is needed.  [The new file `composite.tmac' loaded at start-up already
  contains proper calls to `.composite'.]

  Please refer to the info pages of groff and to the groff_char man page
  for more details.

o A new request `fschar' has been added to define font-specific fallback
  characters.  They are searched after the list of fonts declared with the
  `fspecial' request but before the list of fonts declared with `special'.

o Fallback characters defined with `fschar' can be removed with the
  new `rfschar' request.

o A new request `schar' has been added to define global fallback
  characters.  They are searched after the list of fonts declared with the
  `special' request but before the already mounted special fonts.

o In groff versions 1.18 and 1.18.1, \D'f ...' didn't move the current
  point horizontally.  Despite of being silly, this change has been
  reverted for backwards compatibility.  Consequently, the intermediate
  output command `Df' also moves the position horizontally again.

  \D'f ...' is deprecated since it depends on the horizontal resolution of
  the output device (given with the `hor' parameter in the DESC file).
  Use the new \D'Fg ...' escape instead.

o For orthogonality, new \D subcommands to change the fill color are
  available:

    \D'Fr ...' (rgb)
    \D'Fc ...' (cmy)
    \D'Fg ...' (gray)
    \D'Fk ...' (cmyk)
    \D'Fd'     (default color)

  The arguments are the same as with the `defcolor' request.  The current
  position is *not* changed.

o The values set with \H and \S are now available in number registers
  \n[.height] and \n[.slant], respectively.

o The `.pe' number register isn't new but hasn't been documented before.
  It is set to 1 during a page ejection caused by the `bp' request.

o The new glyph symbol `tno' is a textual variant of `no'.

o The new glyph symbol `+e' represents U+03F5, GREEK LUNATE EPSILON SYMBOL.
  (Well, it is not really new since it has been previously supported by
  grolj4.)  The mapping for both the dvi and lj4 symbol font has been
  changed accordingly so that Greek small letter epsilon, `*e', has the
  same glyph shape as with other devices.

Grops
-----

o The font `freeeuro.pfa' has been added to provide various default glyph
  shapes for `eu' and `Eu'.

o It is now possible to access all glyphs in a Type 1 font, not only 256
  (provided the font file created by afmtodit has proper entries).  grops
  constructs additional encoding vectors on the fly if necessary.

o The paper size is now emitted via the %%DocumentMedia and PageSize
  mechanisms so that it is no longer required to tell `gv' or `ps2pdf'
  about the paper size.  The `broken' flag value 16 omits this feature
  (the used PostScript command `setpagedevice' is a LanguageLevel 2
  extension) -- if you intend to further process grops output to get an
  encapsulated PS (EPS) file you must also use this option.

  Patch by Egil Kvaleberg <egil@kvaleberg.no>.

o Non-slanted PostScript metrics have been changed again; they no longer
  contain negative left italic correction values.  This assures correct
  spacing with eqn.

Grodvi
------

o The font cmtex10 has been added as the special font `SC' to the DVI fonts.
  It is used as a font-specific special font for CW and CWI.

o New options -l and -p to set landscape orientation and the paper size.
  grodvi now emits a `papersize' special which is understood by DVI drivers
  like dvips.

  Consequently, the DESC file should contain a `papersize' keyword.

o The glyph shapes for \[*f] and \[*e] have been exchanged with \[+f] and
  \[+e], respectively, to be in sync with all other devices.

o Glyphs \[HE] and \[DI] have been replaced with \[u2662] and \[u2661],
  respectively, since the former two glyphs have a black (filled) shape
  which grodvi doesn't provide by default (it never has actually).

Grolj4
------

o The glyphs \[*e] and \[+e] have been exchanged to be in sync with
  all other devices.

o The glyph \[~=] is now called \[|=].  Similar to other devices, \[~=]
