.\" -*- mode: text; coding: utf-8; -*-
.\"
.\" Copyright (C) 2012-2020 Free Software Foundation, Inc.
.\"
.\" This file is part of mom, which is part of groff, a free software
.\" project.
.\"
.\" You can redistribute it and/or modify it under the terms of the
.\" GNU General Public License as published by the "Free Software
 \" Foundation", version\~2.
.\"
.\" The license text is available on the internet at
.\" <http://www.gnu.org/licenses/gpl-2.0.html>
.\"
.PAPER A4
.\" Reference macros (metadata)
.TITLE     "Producing PDFs" "with groff and mom"
.PDF_TITLE "\*[$TITLE]
.COPYRIGHT "20\*[BU3]1\*[BU2]5, 20\*[BU3]1\*[BU2]7 Free Software Foundation
.AUTHOR "Deri James" "\*[UP .5p]and" "Peter Schaffter"
.\" Cover author style
.COVER_AUTHOR_STYLE \
  LEAD 15 \
  SPACE -.5v
.\" Docheader author style
.AUTHOR_STYLE \
 LEAD 14 \
 SPACE -.75
.ATTRIBUTE_STRING ""  \" Don't print 'by'
.\"
.PDF_BOOKMARKS_OPEN 2
.\" Formatting style, margins
.PRINTSTYLE TYPESET
.L_MARGIN   2.5c
.R_MARGIN   2.5c
.B_MARGIN   2.5c
.\" General defaults
.FAM      H
.FT       R
.PT_SIZE  10.5
.AUTOLEAD 3
.PARA_INDENT 0  \" No indent because we're spacing paragraphs.
.COVERTEXT
.SP .5v
.QUAD CENTER
.HY off
.IB 8P
.\" Copyright notice
This file is part of groff, the GNU roff typesetting system.
.SP .5v
Groff is free software.  You can redistribute it
and\*[FU3]/or modify it under the terms of the GNU
General Public License as published by the
Free Software Foundation, either version 3
of the License, or (at your option) any later
version.
.SP .5v
You should have received a copy of the GNU
General Public License along with this program.
If not, see:
.SP .25v
.PDF_LINK_COLOR 0.0 0.3 0.9
.PDF_WWW_LINK http://www.gnu.org/licenses/
.IQ CLEAR
.HY
.COVERTEXT end
.\" Cover and page header
.COVER TITLE AUTHOR COPYRIGHT COVERTEXT
.HEADER_LEFT "James, Schaffter"
.\"
.COVER_LEAD     +3.5
.DOCHEADER_LEAD +3.5
.\" Color for code snippets
.NEWCOLOUR dark-grey RGB #343434
.\" Make QUOTE look like CODE
.QUOTE_STYLE \
  FAMILY C \
  FONT   B \
  SIZE   +1.5 \
  COLOR  dark-grey \
  INDENT 9p
.\"
.CODE_STYLE \
  FONT  B \
  SIZE  115 \
  COLOR dark-grey
.CONDENSE 87 \" Condense percentage used in COD
.\"
.HEADING_STYLE 1 \
  NUMBER \
  FONT B \
  SIZE +1 \
  BASELINE_ADJUST \n[.v]/5
.HEADING_STYLE 2 \
  NUMBER \
  FONT I \
  SIZE +.25 \
  BASELINE_ADJUST \n[.v]/5
.\"
.FOOTNOTE_SIZE -1
.\" Character definitions for program names, opts, etc.
.char \[ghostscript]     \*[BD]ghostscript\*[PREV]
.char \[groff]           \*[BD]groff\*[PREV]
.char \[gropdf]          \*[BD]gropdf\*[PREV]
.char \[grops]           \*[BD]grops\*[PREV]
.char \[man]             \*[BD]man\*[PREV]
.char \[-mom]            \*[BD]\-mom\*[PREV]
.char \[mom]             \*[BD]mom\*[PREV]
.char \[-mpdfmark]       \*[BD]\-mpdfmark\*[PREV]
.char \[ms]              \*[BD]ms\*[PREV]
.char \[pdfmom]          \*[BD]pdfmom\*[PREV]
.char \[pdfroff]         \*[BD]pdfroff\*[PREV]
.char \[-P-e]            \*[BD]\-P\-e\*[PREV]
.char \[-P-p<papersize>] \*[BD]\-P\-p<papersize>\*[PREV]
.char \[ps2pdf]          \*[BD]ps2pdf\*[PREV]
.char \[psselect]        \*[BD]psselect\*[PREV]
.char \[-T]              \*[BD]\-T\*[PREV]
.char \[-Tpdf]           \*[BD]\-Tpdf\*[PREV]
.char \[-Tps]            \*[BD]\-Tps\*[PREV]
.\" Strings for inline code
.ds cod  \E*[CODE]\&\E*[COND]
.ds codx \E*[CONDX]\E*[CODE off]\&
.\" Paragraph spacing
.PARA_SPACE .3v
.\" Wrapper around QUOTE
.de COD
. QUOTE
. nop \*[COND]\\$*\*[CONDX]
. QUOTE OFF
..
.\" Table of contents
.TOC_PADDING 2
.SPACE_TOC_ITEMS
.AUTO_RELOCATE_TOC
.TOC_ENTRY_STYLE 2 FONT I
.TOC_LEAD 14.5 ADJUST
.TOC_PADDING 1
.\"
.DOCHEADER_ADVANCE 5c \" Begin docheader this distance down from top of page
.\"
.NO_SHIM \" Use flex spacing
.START
.
.SP .5c
.HEADING 1 NAMED intro "Introduction"
.PP
.RW .12
PDF documents are intended to be "electronic paper,\*[BU6]" and, as
such, take advantage of the digital medium in ways that PostScript
documents do not.  Chief amongst these are clickable links that
point to named destinations, either within the documents themselves
.PDF_LINK internal PREFIX ( SUFFIX ) "internal links"
or to remote web pages
.PDF_LINK external PREFIX ( SUFFIX ), "external links"
and the generation of a clickable document outline that appears in
the Contents panel of most PDF viewers.
.PP
.RW .01
Using \[groff] and \[mom] to produce PDF documents results in the
automatic generation of clickable document outlines (discussed
below,
.PDF_LINK outline SUFFIX ), +
and, if the \*[cod]TOC\*[codx] macro is included in the source file,
entries in the printable table of contents can be clicked on as well
when the document is viewed at the screen (see
.PDF_LINK toc SUFFIX ). +
.RW 0
.HEADING 1 NAMED generating "Using groff to generate PDF files"
.PP
Groff provides more than one way to generate PDF documents from
files formatted with the \[mom] macros.  One is to call \[groff]
directly, either with
.COD "groff [\-Tps] \-mom \-m pdfmark doc.mom | ps2pdf \- doc.pdf
which pipes output from the \[grops] PostScript driver through
\[ps2pdf], or
.COD "groff \-Tpdf \-mom doc.mom > doc.pdf
which uses the native PDF driver, \[gropdf].  Alternatively, one may
call the wrapper
.COD "pdfroff \-mom \-mpdfmark \-\-no-toc doc.mom > doc.pdf
A fourth, preferred method is to use
.PDF_LINK pdfmom SUFFIX , "\[pdfmom]"
which is strongly recommended since it implements the full range
of PDF features available in \[mom].
.COD "pdfmom doc.mom > doc.pdf
One reason to prefer using the native PDF driver (via \[pdfmom] or
\[-Tpdf]) is that papersizes set within mom source files (see
.PDF_WWW_LINK https://www.schaffter.ca/mom/momdoc/typesetting.html#page-setup-intro SUFFIX ) \
  "paper and page setup macros"
do not require a corresponding \[-P-p<papersize>] flag on the
command line.
.PP
There are other minor differences between the methods, discussed
.PDF_LINK pdf-diff SUFFIX . "here"
.RW 0
.HEADING 1 NAMED links "Creating PDF links with mom"
.PP
Often, but not always, links in the body of a PDF document point
to headings elsewhere in the same document.  Creating these links
is a simple process.  First, identify the places to link to
("destinations"), then link to them from any place in the document.
.HEADING 2 NAMED naming "Creating destination points at headings"
.PP
The first step in creating links to a heading is to give the
heading a unique destination name.  With mom, this is done by
adding \*[cod]NAMED\|<id>\*[codx] to the HEADING macro, where
\*[cod]<id>\*[codx] is a unique identifier for the heading.  For
example,
.PDF_TARGET intro-ex
.COD "\&.HEADING 1 NAMED intro \[dq]Introduction\[dq]"
would, in addition to printing the head in the body of the document,
identify the introduction by the unique id, "intro"\*[BU6].  This
id, or name, can then be used to create links to the introduction
from any part of the document.
.PP
Furthermore, \*[cod]NAMED\|<id>\*[codx] stores the text of the
heading for use later on when linking to it (see
.PDF_LINK internal SUFFIX ). +
If headings are being numbered, the heading number is prepended.
.HEADING 2 NAMED target  "Creating destination points at arbitrary locations"
.PP
Any part of a document can be a link destination, not just headings.
For example, say you create a table that needs to be referred to
from other parts of the document.  You'd identify the location of
the table by placing
.COD "\&.PDF_TARGET <id> \[dq]<text>\[dq]"
just above the table in the source file.  As with
\*[cod]HEADING\*[codx], \*[cod]<id>\*[codx] is any unique name.
\*[cod]<text>\*[codx] is optional. \*[cod]<id>\*[codx] can now be linked
to from anywhere in the document.
.SP 2.5p
.HEADING 2 NAMED internal "Creating internal links"
.PP
Internal links are clickable text areas that allow you to jump to
named destinations within a document.  (See
.PDF_LINK external "here"
for a description of external links.)
.PP
Internal links are created with the macro \*[cod]PDF_LINK\*[codx],
which takes the form
.COD "\&.PDF_LINK <id> [PREFIX <text>] [SUFFIX <text>] \
\[dq]<hotlink text>\[dq]"
where \*[cod]<id>\*[codx] is a named destination point elsewhere in
the document (see
.PDF_LINK naming +
and
.PDF_LINK target SUFFIX ). +
.PP
\*[cod]PREFIX\|<text>\*[codx] and \*[cod]SUFFIX\|<text>\*[codx], both or
either of which are optional, are printed around the clickable area
but do not form part of the link itself.
.PP
\*[cod]<hotlink text>\*[codx] is the text that should be clickable,
identifiable in the PDF document by the colour assigned to links
(see
.PDF_LINK colour SUFFIX ). +
.PDF_TARGET expando
.PP
If the hotlink text ends in \*[cod]\[dq]*\[dq]\*[codx]\*[BU9],
the asterisk is replaced by the text of the destination
point, assuming it's a heading.  If the hotlink text ends in
\*[cod]\[dq]+\[dq]\*[codx]\*[BU9], the replacement text is surrounded
by quotes.
.PP
Using our
.PDF_LINK intro-ex SUFFIX , "HEADING example"
.RW .1
above, the following invocation of \*[cod]PDF_LINK\*[codx] would
produce a click\%able link to the introduction:
.COD "\&.PDF_LINK intro PREFIX ( SUFFIX ). \[dq]see: +\[dq]"
.RW 0
In the text, the link would look like this:
.PDF_LINK intro PREFIX ( SUFFIX ). "see: +"
.HEADING 2 NAMED external "Creating external links"
.PP
External links are clickable text areas whose destination is a
URL.  Clicking on them causes a browser window to pop up with the
destination address.
.PP
The format of the macro to create external links is similar to the
one for creating internal links:
.COD "\&.PDF_WWW_LINK <url> [PREFIX <text>] [SUFFIX <text>] [\[dq]<hotlink text>\[dq]]"
\*[cod]<url>\*[codx] is any valid URL, usually a web address;
\*[cod]PREFIX\|<text>\*[codx] and \*[cod]SUFFIX\|<text>\*[codx] have
exactly the same meaning, as does \*[cod]<hotlink text>\*[codx],
which furthermore accepts the same expandos, \*[cod]\[dq]+\[dq]\*[codx] and
\*[cod]\[dq]*\[dq]\*[codx].
.PP
.RW .1
If no hotlink text is given, then \*[cod]<url>\*[codx] is
used as the text.  If hotlink text is given and ends in
\*[cod]\[dq]*\[dq]\*[codx]\*[BU9], the asterisk is replaced by the
URL.  If it ends in \*[cod]\[dq]+\[dq]\*[codx]\*[BU9], the URL is
surrounded by quotes.  As an example,
.RW 0
.COD "\&.PDF_WWW_LINK https://www.schaffter.ca/mom/momdoc/toc.html
would open mom's online documentation at
.PDF_WWW_LINK https://www.schaffter.ca/mom/momdoc/toc.html SUFFIX "."
The same, with \*[cod]\[dq]here\[dq]\*[codx] supplied as
hotlink text, lets you click
.PDF_WWW_LINK https://www.schaffter.ca/mom/momdoc/toc.html "here"
instead.
.HEADING 2 NAMED colour  "Assigning a colour to links"
.PP
The colour of links is set with
.COD "\&.PDF_LINK_COLOR <xcolor> | <newcolor> | <r g b> | <#rrggbb>
where \*[cod]<xcolor>\*[codx] or \*[cod]<newcolor>\*[codx] are the names
of colours already initialized with
.PDF_WWW_LINK https://www.schaffter.ca/mom/momdoc/color.html#xcolor "XCOLOR"
or
.PDF_WWW_LINK https://www.schaffter.ca/mom/momdoc/color.html#newcolor SUFFIX . "NEWCOLOR"
If you prefer to define a new colour (using the RGB colour scheme),
enter it either as 3 numbers between
0.0 \*[UP 1p]\[->]\*[DOWN 1p] 1\*[BU4].0
or as a 6 character hex string.  Thus
.SP .5v
\*[FWD 6p]\*[cod].PDF_LINK_COLOR #ff0000\*[codx]
\ \*[SIZE -.5]and\*[SIZE]\ \"
\*[cod].PDF_LINK_COLOR 1.0 0 0\*[codx]
.SP .5v
both lead to mom using
.PDF_LINK_COLOR 1 0 0
.PDF_LINK colour red
.PDF_LINK_COLOR
links.
.PP
The default colour can be restored by calling
\*[cod]PDF_LINK_COLOR\*[codx] with no parameter.
.FLOAT
.JUSTIFY
.BOX-NOTE 3P
\*[BD]Note:\*[PREV]
The decimal scheme for creating colours must be used if a file is to
be processed with
\[oq]\[groff]\~\[-Tps]\~\[-mpdfmark]\[cq],
\[oq]\[pdfroff]\[cq], or
\[oq]\[pdfmom]\~\[-Tps]\[cq].
.IBQ
.FLOAT off
.SP .5v
.HEADING 1 NAMED outline "The PDF Outline"
.PP
Most PDF viewers provide a panel that displays a document's outline,
similar to a table of contents.  Clicking on an entry navigates
directly to the appropriate place in the document.
.PP
Mom generates PDF outlines the same way she populates
her own table of contents: by intercepting calls to the
\*[cod]HEADING\*[codx] macro, as well as to the various title
and chapter macros used in namimg documents, and allocating each a
hierarchic level.
.PP
Covers, titles/chapters, and the table of contents are all
assigned to level 1\*[BU5].  Subsequent headings are assigned to
n\*[UP 1p]+\*[DOWN 1p]\*[BU4]1, where n is the level given to
\*[cod]HEADING\*[codx].
.PP
.RW .22
The PDF outline can sensibly recover from skipped or omitted heading
levels; the printed table of contents cannot.  Users are therefore
advised to use headings in logical order, not for typographic
effects.
.RW 0
.HEADING 2 NAMED open-close "Opening and closing levels
.PP
A level is said to be open if one or more levels beneath it is
visible in the PDF outline.  Closed \%levels have at least one level
beneath them that is not visible unless the closed link is clicked.
It is common for only the first two levels to be open so the outline
doesn't look cluttered.
.PP
To establish which levels should be open by default when a document
loads, use
.COD "\&.PDF_BOOKMARKS_OPEN n
where \*[cod]n\*[codx] is a number specifying at which level all
subsequent ones should be closed.
.PP
If, at any point in the document, you specify
.COD "\&.PDF_BOOKMARKS_OPEN NO  \e\[dq] or any other text argument
then all subsequent bookmarks will be closed until
\*[cod]PDF_BOOKMARKS_OPEN\*[codx] opens them again.
.HEADING 2 NAMED disabling "Suspending/disabling collection of outline entries
.PP
Suspending the collection of entries for the PDF outline is
accomplished with
.COD "\&.PDF_BOOKMARKS OFF
Mom's default is to collect entries, so if the command is placed at
the start of a document, it \%disables entry collection completely.
Elsewhere, it suspends collection until you re-enable it with
.COD "\&.PDF_BOOKMARKS  \e\[dq] i.e. with no parameter
.SP -1
.HEADING 2 NAMED pdf:title "The PDF window title"
.PP
While not strictly part of the PDF outline, the title of a document
can be displayed as the document viewer's window title.  The macro
to accomplish this is
.COD "\&.PDF_TITLE\ \[dq]<window title>\[dq]
It can take any text, so the viewer window title need not be the
same as the document's title.
.FLOAT
.JUSTIFY
.BOX-NOTE 4P+8p
\*[BD]Note:\*[PREV] The macro, \*[cod]DOC_TITLE\*[codx], always
invokes \*[cod]PDF_TITLE\*[codx].  If this is not what you want, you
can remove the window title by issuing
.COD ".PDF_TITLE \[dq]\[dq] \e\[dq] ie. with a blank argument
.IBQ
.FLOAT off
\#.SP .5v
.HEADING 1 NAMED toc "Tables of Contents"
.RLD .5v
.HEADING 2 NAMED toc:gen "Generating a Table of Contents
.PP
.RW .1
To generate a printable Table of Contents for any document, simply
insert the macro, \*[cod]TOC\*[codx], as the last line of the source
file. (Formatting of the printable Table of Contents is discussed in
detail in the
.PDF_WWW_LINK \
https://www.schaffter.ca/mom/momdoc/tables-of-contents.html#top \
SUFFIX ). "mom documentation"
When the file is processed and loaded in a viewer, entries in the
Table of Contents will be clickable links.
.RW 0
.PP
Whichever link colour is active at the end of the document, prior to
\*[cod]TOC\*[codx], will be used for the \%Table of Contents
links.
.HEADING 2 NAMED toc:pos  "Positioning the Table of Contents"
.PP
If \[groff]'s PostScript device (\[-Tps]) is used to process a mom
file, the Table of Contents is printed at the end of the document.
When this is not desirable, the PostScript output from \[groff]
must be processed with \[psselect] in order to place the TOC in the
preferred location.
.PP
When using mom and \[groff]'s native pdf device (via \[pdfmom] or
\[groff] \[-Tpdf]), positioning of the Table of Contents can be done
within the source file.
.PP
The command to control the placement of the TOC is
.COD "\&.AUTO_RELOCATE_TOC [<position>]
where the optional \*[cod]<position>\*[codx] can be one of these
keywords:
.LEFT
.IL 2P
.SP .25v
\*[SIZE -.7]TOP\*[FU2]\*[UP .5p]\c
.FOOTNOTE
\*[BD]Note:\*[PREV] Documents without a COVER or DOC_COVER require
the \*[cod]TOP\*[codx] argument.
.FOOTNOTE off
\*[IT]\*[SIZE +.2]\
(ie. at the very start of the document)\*[SIZE -.2]\*[PREV]
BEFORE_DOCCOVER
AFTER_DOCCOVER
BEFORE_COVER
AFTER_COVER\*[SIZE +.7]
.SP .25v
.ILQ
.JUSTIFY
It is normally not necessary to supply a keyword, since
\*[cod]AUTO_RELOCATE_TOC\*[codx] places the TOC after the DOC_COVER,
if there is one, or the first COVER when no DOC_COVER is present.
In rare instances where it is desirable to place the TOC somewhere
else in the document, there are two low-level commands,
\*[cod].TOC_BEFORE_HERE\*[codx]
\ \*[SIZE -.5]and\*[SIZE]\ \"
\*[cod].TOC_AFTER_HERE\*[codx]
which place the TOC either before or after the current page.
.PP
These last two commands have a small catch: although the TOC will
appear where specified, the \%"Contents" entry in the PDF outline,
which observes a hierarchy of levels, will assign the TOC to
level\~\*[BU4]1\*[BU4], possibly disrupting the visual ordering of
levels in the outline.
.HEADING 1 NAMED simplify "pdfmom: Simplifying PDF output"
.PP
As explained in the section
.PDF_LINK generating SUFFIX , *
.RW .15
there are two established methods
.RW 0
for creating PDF files with \[groff]: the original method, ie.
passing the \[-Tps] and \[-mpdfmark] options to \[groff] (or using
\[pdfroff], which does this for you); or the newer \[-Tpdf], which
produces PDF files natively.
.HEADING 2 NAMED fwd:ref "The problem of forward references"
.PP
.EW .2
Both methods encounter difficulties when dealing with forward
references; that is, when a link \*[IT]\%earlier\/\*[PREV] in a
document refers to a destination \*[IT]later\/\*[PREV] in the
document and the link text terminates
.EW 0
with one of the expandos,
\*[cod]\[dq]*\[dq]\*[codx] or \*[cod]\[dq]+\[dq]\*[codx]
(explained
.PDF_LINK expando SUFFIX ). "here"
Mom doesn't know what text to put in the expando because it has not
yet been defined.  This means that \[groff] must be run multiple
times to find the unknown text.
.PP
.EW .2
The program \[pdfroff] exists to handle these multiple runs, but it
imposes some limitations on the PDF features available with \[mom].
.EW 0
.HEADING 2 NAMED pdfmom "pdfmom"
.PP
\[pdfmom] performs the same function as \[pdfroff], and is the
preferred, trouble-free way to generate PDF documents from a mom
source file.  Like \[pdfroff], it is a frontend to \[groff] and
accepts all the same options (see \[man]\~\[groff]).
.PP
.EW .2
Called as-is, \[pdfmom] accepts all the same options as \[groff],
and requires no additional flags.  PDF generation is performed by
\[gropdf], \[groff]'s native PDF driver:
.EW 0
.COD "pdfmom doc.mom [groff opts] > doc.pdf
If a \[-Tps] option is supplied, \[pdfmom] hands control over to
\[pdfroff], and both \[groff] and \[pdfroff] options may given.
The resulting PDF is produced from PostScript output fed into
\[ghostscript].
.COD "pdfmom \-Tps [pdfroff opts [groff opts]] doc.mom > doc.pdf
For either invocation, it is not necessary to add \[-mom] or
\[-mpdfmark], as these are implied.
.PP
.RW .04
If Encapsulated PostScript or plain PostScript images have been
embedded in a document with
.PDF_WWW_LINK https://www.schaffter.ca/mom/momdoc/images.html#pspic SUFFIX , \
  "PSPIC"
the \[-Tps] option must be used.  In most other cases, \[pdfmom]
with no \[-T] flag is preferable.
.RW 0
.HEADING 2 NAMED papersize "Setting papersize within a source file"
.PP
A significant convenience afforded by using \[pdfmom] (or \[groff]
with the \[-Tpdf] flag) is that papersizes or page dimensions set
within mom source files (see
.PDF_WWW_LINK https://www.schaffter.ca/mom/momdoc/typesetting.html#page-setup-intro \
  SUFFIX ) "paper and page setup macros"
do not require a corresponding \[-P-p<papersize>] option on the
command line.  It is even possible to create documents with
unequal-sized pages.
.HEADING 2 NAMED pdf-diff \
"Differences between pdfmom and pdfroff"
.PP
Several features described in this manual are not available when
the \[-Tps] option is given to \[pdfmom], nor when using \[pdfroff]
or \[groff]\~\[-Tps]\~\[-mpdfmark]:
.SP .25v
.QUAD LEFT
.HYPHENATION off
.IB 16p
.LIST
.ITEM
.PDF_LINK toc:pos "Relocation of the Table of Contents"
is not supported.  The TOC appears at the end of the document;
\[psselect] must be used to re-order pages.
.ITEM
.RW .08
.WS -2
If a link crosses a page boundary, it will stop being a clickable
hotspot on subsequent pages.
.RW 0
.ITEM
When establishing whether PDF outline levels are
.PDF_LINK open-close SUFFIX , "open or closed"
only the numerical parameter to \*[cod]PDF_BOOKMARKS_OPEN\*[codx] has
any effect.
.ITEM
.PDF_LINK colour "PDF_LINK_COLOR"
only accepts colour definitions in decimal notation.
.LIST OFF
.IQ
.HEADING 1 \
"Comparison of \-Tps\*[FU4]/\*[FU2]\-mpdfmark with \-Tpdf\*[FU4]/\*[FU2]\-mom
.SP .25v
.IB
\[-Tps]\*[FU4]/\*[FU2]\[-mpdfmark]
.LIST
.SHIFT_LIST 1P+6p
.ITEM
does not support all the features described here
.ITEM
accepts images and graphics embedded with PSPIC
.LIST OFF
.IQ
.ALD .4v
.IB
\[-Tpdf]\*[FU4]/\*[FU2]\[-mom]
.LIST
.SHIFT_LIST 1P+6p
.ITEM
facilitates embedding fonts directly in the PDF file (if the
\[-P-e] flag is given on the command line)
.ITEM
sets papersize from within the source file, circumventing the need
for the papersize flag (\[-P-p<papersize>]) on the command line
.ITEM
is not compatible with
.PDF_WWW_LINK \
  https://www.schaffter.ca/mom/momdoc/docprocessing.html#printstyle \
  "PRINTSTYLE TYPEWRITE"
underlining (e.g., of italics)
.ITEM
generally produces larger files; these can be reduced by piping
the output through \[ps2pdf]
.SP -1.25v
.BOX OUTLINED black SHADED grey90 WEIGHT 1p INSET 6p
.JUSTIFY
\*[BD]Note:\*[PREV] Owing to a known bug, PDF files piped through
\[ps2pdf] lose some of their metadata, notably the window title set
with \*[cod]PDF_TITLE\*[codx].
.BOX STOP
.SP -.25v
.LIST OFF
.TOC
.\" Local Variables:
.\" mode: nroff
.\" End:
.\" vim: filetype=groff:
