Update years in copyright notice; nfc.

[bpt/emacs.git] / man / help.texi

diff --git a/man/help.texi b/man/help.texi
index 2c4a0b2..bcae911 100644 (file)
--- a/man/help.texi
+++ b/man/help.texi
@@ -1,6 +1,6 @@
 @c This is part of the Emacs manual.
 @c This is part of the Emacs manual.

-@c Copyright (C) 1985, 86, 87, 93, 94, 95, 97, 2000
-@c   Free Software Foundation, Inc.
+@c Copyright (C) 1985, 1986, 1987, 1993, 1994, 1995, 1997, 2000, 2001,
+@c   2002, 2003, 2004, 2005 Free Software Foundation, Inc.

 @c See file emacs.texi for copying conditions.
 @node Help, Mark, M-x, Top
 @chapter Help
 @c See file emacs.texi for copying conditions.
 @node Help, Mark, M-x, Top
 @chapter Help


@@ -12,8 +12,8 @@
 @kindex F1
 
   Emacs provides extensive help features accessible through a single
 @kindex F1
 
   Emacs provides extensive help features accessible through a single

-character, @kbd{C-h}.  @kbd{C-h} is a prefix key that is used only for
-documentation-printing commands.  The characters that you can type after
+character, @kbd{C-h}.  @kbd{C-h} is a prefix key that is used for
+commands that display documentation.  The characters that you can type after

 @kbd{C-h} are called @dfn{help options}.  One help option is @kbd{C-h};
 that is how you ask for help about using @kbd{C-h}.  To cancel, type
 @kbd{C-g}.  The function key @key{F1} is equivalent to @kbd{C-h}.
 @kbd{C-h} are called @dfn{help options}.  One help option is @kbd{C-h};
 that is how you ask for help about using @kbd{C-h}.  To cancel, type
 @kbd{C-g}.  The function key @key{F1} is equivalent to @kbd{C-h}.


@@ -25,11 +25,10 @@ help options, each with a brief description.  Before you type a help
 option, you can use @key{SPC} or @key{DEL} to scroll through the list.
 
   @kbd{C-h} or @key{F1} means ``help'' in various other contexts as
 option, you can use @key{SPC} or @key{DEL} to scroll through the list.
 
   @kbd{C-h} or @key{F1} means ``help'' in various other contexts as

-well.  For example, in the middle of @code{query-replace}, it describes
-the options available for how to operate on the current match.  After a
-prefix key, it displays a list of the alternatives that can follow the
-prefix key.  (A few prefix keys don't support @kbd{C-h}, because they
-define other meanings for it, but they all support @key{F1}.)
+well.  After a prefix key, it displays a list of the alternatives that
+can follow the prefix key.  (A few prefix keys don't support
+@kbd{C-h}, because they define other meanings for it, but they all
+support @key{F1}.)

 
   Most help buffers use a special major mode, Help mode, which lets you
 scroll conveniently with @key{SPC} and @key{DEL}.  It also offers
 
   Most help buffers use a special major mode, Help mode, which lets you
 scroll conveniently with @key{SPC} and @key{DEL}.  It also offers


@@ -38,46 +37,54 @@ customization buffers and the like.  @xref{Help Mode}.
 
 @cindex searching documentation efficiently
 @cindex looking for a subject in documentation
 
 @cindex searching documentation efficiently
 @cindex looking for a subject in documentation

-  If you are looking for a certain feature, but don't know where exactly
-it is documented, and aren't even sure what is the name of the related
-command or option, we recommend these commands:
+  If you are looking for a certain feature, but don't know where
+exactly it is documented, and aren't sure of the name of a
+related command or variable, we recommend trying these methods.  Usually
+it is best to start with an apropos command, then try searching the
+manual index, then finally look in the FAQ and the package keywords.

 
 @table @kbd
 @item C-h a @var{topic} @key{RET}
 This searches for commands whose names match @var{topic}, which should
 
 @table @kbd
 @item C-h a @var{topic} @key{RET}
 This searches for commands whose names match @var{topic}, which should

-be a regular expression (@pxref{Regexps}).  Browse the buffer popped
-up by Emacs, to find what you are looking for.  @xref{Apropos}.
+be a regular expression (@pxref{Regexps}).  Browse the buffer that this
+command displays to find what you are looking for.  @xref{Apropos}.

 
 

-@item M-x apropos @var{topic} @key{RET}
-This works like @kbd{C-h a}, but it also searches for user options and
-other variables, in case the feature you are looking for is controlled
-by an option, not a command.  @xref{Apropos}.
+@item M-x apropos @key{RET} @var{topic} @key{RET}
+This works like @kbd{C-h a}, but it also searches for noninteractive
+functions and for variables.  @xref{Apropos}.

 
 

-@item M-x apropos-documentation @var{topic} @key{RET}
+@item M-x apropos-documentation @key{RET} @var{topic} @key{RET}

 This searches the @emph{documentation strings} (the built-in short
 descriptions) of all variables and functions (not their names) for a
 match for @var{topic}, a regular expression.  @xref{Apropos}.
 
 This searches the @emph{documentation strings} (the built-in short
 descriptions) of all variables and functions (not their names) for a
 match for @var{topic}, a regular expression.  @xref{Apropos}.
 

-@item C-h i m emacs @key{RET} i @var{topic} @key{RET}
+@item C-h i d m emacs @key{RET} i @var{topic} @key{RET}

 This looks up @var{topic} in the indices of the Emacs on-line manual.
 This looks up @var{topic} in the indices of the Emacs on-line manual.

-There may be several matches, so displays the first one.  You can then
-press @key{,} to move to other matches, until you find what you are
+If there are several matches, Emacs displays the first one.  You can then
+press @kbd{,} to move to other matches, until you find what you are

 looking for.
 
 looking for.
 

-@item C-h i m emacs @key{RET} s @var{topic} @key{RET}
+@item C-h i d m emacs @key{RET} s @var{topic} @key{RET}

 Similar, but searches for @var{topic} (which can be a regular
 expression) in the @emph{text} of the manual rather than in its
 indices.
 
 Similar, but searches for @var{topic} (which can be a regular
 expression) in the @emph{text} of the manual rather than in its
 indices.
 

-@item C-h F
-This brings up the Emacs FAQ, where you can use the usual search
-commands (@pxref{Search}) to find the information.
+@item C-h C-f
+This brings up the Emacs FAQ.  You can use the Info commands
+to browse it.

 
 @item C-h p
 Finally, you can try looking up a suitable package using keywords
 pertinent to the feature you need.  @xref{Library Keywords}.
 @end table
 
 
 @item C-h p
 Finally, you can try looking up a suitable package using keywords
 pertinent to the feature you need.  @xref{Library Keywords}.
 @end table
 

+  To find the documentation of a key sequence or a menu item, type
+@kbd{C-h K} and then type that key sequence or select the menu
+item.  This looks up the description of the command invoked by the key
+or the menu in the appropriate manual (not necessarily the Emacs
+manual).  Likewise, use @kbd{C-h F} for reading documentation of a
+command.
+

 @menu
 * Help Summary::       Brief list of all Help commands.
 * Key Help::           Asking what a key does in Emacs.
 @menu
 * Help Summary::       Brief list of all Help commands.
 * Key Help::           Asking what a key does in Emacs.


@@ -87,18 +94,21 @@ pertinent to the feature you need.  @xref{Library Keywords}.
 * Language Help::       Help relating to international language support.
 * Help Mode::           Special features of Help mode and Help buffers.
 * Misc Help::          Other help commands.
 * Language Help::       Help relating to international language support.
 * Help Mode::           Special features of Help mode and Help buffers.
 * Misc Help::          Other help commands.

+* Help Files::          Commands to display pre-written help files.

 * Help Echo::           Help on active text and tooltips (`balloon help')
 @end menu
 
 @iftex
 @node Help Summary
 @end iftex
 * Help Echo::           Help on active text and tooltips (`balloon help')
 @end menu
 
 @iftex
 @node Help Summary
 @end iftex

-@ifinfo
+@ifnottex

 @node Help Summary
 @section Help Summary
 @node Help Summary
 @section Help Summary

-@end ifinfo
+@end ifnottex

 
 

-  Here is a summary of the defined help commands.
+  Here is a summary of the Emacs interactive help commands.
+@xref{Help Files}, for other help commands that just display a
+pre-written file of information.

 
 @table @kbd
 @item C-h a @var{regexp} @key{RET}
 
 @table @kbd
 @item C-h a @var{regexp} @key{RET}


@@ -109,15 +119,15 @@ Display a table of all key bindings in effect now, in this order: minor
 mode bindings, major mode bindings, and global bindings
 (@code{describe-bindings}).
 @item C-h c @var{key}
 mode bindings, major mode bindings, and global bindings
 (@code{describe-bindings}).
 @item C-h c @var{key}

-Print the name of the command that @var{key} runs
-(@code{describe-key-briefly}).  Here @kbd{c} stands for `character'.  For more
-extensive information on @var{key}, use @kbd{C-h k}.
+Show the name of the command that @var{key} runs
+(@code{describe-key-briefly}).  Here @kbd{c} stands for ``character.''
+For more extensive information on @var{key}, use @kbd{C-h k}.

 @item C-h f @var{function} @key{RET}
 Display documentation on the Lisp function named @var{function}
 (@code{describe-function}).  Since commands are Lisp functions,
 a command name may be used.
 @item C-h h
 @item C-h f @var{function} @key{RET}
 Display documentation on the Lisp function named @var{function}
 (@code{describe-function}).  Since commands are Lisp functions,
 a command name may be used.
 @item C-h h

-Display the @file{hello} file, which shows examples of various character
+Display the @file{HELLO} file, which shows examples of various character

 sets.
 @item C-h i
 Run Info, the program for browsing documentation files (@code{info}).
 sets.
 @item C-h i
 Run Info, the program for browsing documentation files (@code{info}).


@@ -130,16 +140,10 @@ Display a description of the last 100 characters you typed
 (@code{view-lossage}).
 @item C-h m
 Display documentation of the current major mode (@code{describe-mode}).
 (@code{view-lossage}).
 @item C-h m
 Display documentation of the current major mode (@code{describe-mode}).

-@item C-h n
-Display documentation of Emacs changes, most recent first
-(@code{view-emacs-news}).
-@item C-h P
-Display info on known problems with Emacs and possible workarounds
-(@code{view-emacs-problems}).

 @item C-h p
 Find packages by topic keyword (@code{finder-by-keyword}).
 @item C-h s
 @item C-h p
 Find packages by topic keyword (@code{finder-by-keyword}).
 @item C-h s

-Display current contents of the syntax table, plus an explanation of
+Display the current contents of the syntax table, plus an explanation of

 what they mean (@code{describe-syntax}).  @xref{Syntax}.
 @item C-h t
 Enter the Emacs interactive tutorial (@code{help-with-tutorial}).
 what they mean (@code{describe-syntax}).  @xref{Syntax}.
 @item C-h t
 Enter the Emacs interactive tutorial (@code{help-with-tutorial}).


@@ -147,7 +151,7 @@ Enter the Emacs interactive tutorial (@code{help-with-tutorial}).
 Display the documentation of the Lisp variable @var{var}
 (@code{describe-variable}).
 @item C-h w @var{command} @key{RET}
 Display the documentation of the Lisp variable @var{var}
 (@code{describe-variable}).
 @item C-h w @var{command} @key{RET}

-Print which keys run the command named @var{command} (@code{where-is}).
+Show which keys run the command named @var{command} (@code{where-is}).

 @item C-h C @var{coding} @key{RET}
 Describe coding system @var{coding}
 (@code{describe-coding-system}).
 @item C-h C @var{coding} @key{RET}
 Describe coding system @var{coding}
 (@code{describe-coding-system}).


@@ -156,24 +160,21 @@ Describe the coding systems currently in use.
 @item C-h I @var{method} @key{RET}
 Describe an input method (@code{describe-input-method}).
 @item C-h L @var{language-env} @key{RET}
 @item C-h I @var{method} @key{RET}
 Describe an input method (@code{describe-input-method}).
 @item C-h L @var{language-env} @key{RET}

-Describe information on the character sets, coding systems and input
+Display information on the character sets, coding systems, and input

 methods used for language environment @var{language-env}
 (@code{describe-language-environment}).
 methods used for language environment @var{language-env}
 (@code{describe-language-environment}).

-@item C-h C-c
-Display the copying conditions for GNU Emacs.
-@item C-h C-d
-Display information about getting new versions of GNU Emacs.
-@item C-h C-f @var{function} @key{RET}
+@item C-h F @var{function} @key{RET}

 Enter Info and go to the node documenting the Emacs function @var{function}
 (@code{Info-goto-emacs-command-node}).
 Enter Info and go to the node documenting the Emacs function @var{function}
 (@code{Info-goto-emacs-command-node}).

-@item C-h C-k @var{key}
+@item C-h K @var{key}

 Enter Info and go to the node where the key sequence @var{key} is
 documented (@code{Info-goto-emacs-key-command-node}).
 Enter Info and go to the node where the key sequence @var{key} is
 documented (@code{Info-goto-emacs-key-command-node}).

-@item C-h C-p
-Display information about the GNU Project.
-@item C-h @key{TAB} @var{symbol} @key{RET}
+@item C-h S @var{symbol} @key{RET}

 Display the Info documentation on symbol @var{symbol} according to the
 programming language you are editing (@code{info-lookup-symbol}).
 Display the Info documentation on symbol @var{symbol} according to the
 programming language you are editing (@code{info-lookup-symbol}).

+@item C-h .
+Display a help message associated with special text areas, such as
+links in @samp{*Help*} buffers (@code{display-local-help}).

 @end table
 
 @node Key Help
 @end table
 
 @node Key Help


@@ -183,8 +184,8 @@ programming language you are editing (@code{info-lookup-symbol}).
 @findex describe-key-briefly
   The most basic @kbd{C-h} options are @kbd{C-h c}
 (@code{describe-key-briefly}) and @w{@kbd{C-h k}} (@code{describe-key}).
 @findex describe-key-briefly
   The most basic @kbd{C-h} options are @kbd{C-h c}
 (@code{describe-key-briefly}) and @w{@kbd{C-h k}} (@code{describe-key}).

-@kbd{C-h c @var{key}} prints in the echo area the name of the command
-that @var{key} is bound to.  For example, @kbd{C-h c C-f} prints
+@kbd{C-h c @var{key}} displays in the echo area the name of the command
+that @var{key} is bound to.  For example, @kbd{C-h c C-f} displays

 @samp{forward-char}.  Since command names are chosen to describe what
 the commands do, this is a good way to get a very brief description of
 what @var{key} does.
 @samp{forward-char}.  Since command names are chosen to describe what
 the commands do, this is a good way to get a very brief description of
 what @var{key} does.


@@ -198,6 +199,13 @@ This is too big for the echo area, so a window is used for the display.
   @kbd{C-h c} and @kbd{C-h k} work for any sort of key sequences,
 including function keys and mouse events.
 
   @kbd{C-h c} and @kbd{C-h k} work for any sort of key sequences,
 including function keys and mouse events.
 

+@kindex C-h w
+@findex where-is
+  @kbd{C-h w @var{command} @key{RET}} tells you what keys are bound to
+@var{command}.  It displays a list of the keys in the echo area.  If it
+says the command is not on any key, you must use @kbd{M-x} to run it.
+@kbd{C-h w} runs the command @code{where-is}.
+

 @node Name Help
 @section Help by Command or Variable Name
 
 @node Name Help
 @section Help by Command or Variable Name
 


@@ -217,24 +225,23 @@ displays the documentation of @code{auto-fill-mode}.  This is the only
 way to get the documentation of a command that is not bound to any key
 (one which you would normally run using @kbd{M-x}).
 
 way to get the documentation of a command that is not bound to any key
 (one which you would normally run using @kbd{M-x}).
 

-  @kbd{C-h f} is also useful for Lisp functions that you are planning to
-use in a Lisp program.  For example, if you have just written the
-expression @code{(make-vector len)} and want to check that you are using
-@code{make-vector} properly, type @kbd{C-h f make-vector @key{RET}}.
-Because @kbd{C-h f} allows all function names, not just command names,
-you may find that some of your favorite abbreviations that work in
-@kbd{M-x} don't work in @kbd{C-h f}.  An abbreviation may be unique
-among command names yet fail to be unique when other function names are
-allowed.
-
-  The function name for @kbd{C-h f} to describe has a default which is
-used if you type @key{RET} leaving the minibuffer empty.  The default is
-the function called by the innermost Lisp expression in the buffer around
-point, @emph{provided} that is a valid, defined Lisp function name.  For
-example, if point is located following the text @samp{(make-vector (car
-x)}, the innermost list containing point is the one that starts with
-@samp{(make-vector}, so the default is to describe the function
-@code{make-vector}.
+  @kbd{C-h f} is also useful for Lisp functions that you are planning
+to use in a Lisp program.  For example, if you have just written the
+expression @code{(make-vector len)} and want to check that you are
+using @code{make-vector} properly, type @kbd{C-h f make-vector
+@key{RET}}.  Because @kbd{C-h f} allows all function names, not just
+command names, you may find that some of your favorite completion
+abbreviations that work in @kbd{M-x} don't work in @kbd{C-h f}.  An
+abbreviation may be unique among command names, yet fail to be unique
+when other function names are allowed.
+
+  The default function name for @kbd{C-h f} to describe, if you type
+just @key{RET}, is the name of the function called by the innermost Lisp
+expression in the buffer around point, @emph{provided} that is a valid,
+defined Lisp function name.  For example, if point is located following
+the text @samp{(make-vector (car x)}, the innermost list containing
+point is the one that starts with @samp{(make-vector}, so the default is
+to describe the function @code{make-vector}.

 
   @kbd{C-h f} is often useful just to verify that you have the right
 spelling for the function name.  If @kbd{C-h f} mentions a name from the
 
   @kbd{C-h f} is often useful just to verify that you have the right
 spelling for the function name.  If @kbd{C-h f} mentions a name from the


@@ -242,24 +249,18 @@ buffer as the default, that name must be defined as a Lisp function.  If
 that is all you want to know, just type @kbd{C-g} to cancel the @kbd{C-h
 f} command, then go on editing.
 
 that is all you want to know, just type @kbd{C-g} to cancel the @kbd{C-h
 f} command, then go on editing.
 

-@kindex C-h w
-@findex where-is
-  @kbd{C-h w @var{command} @key{RET}} tells you what keys are bound to
-@var{command}.  It prints a list of the keys in the echo area.  If it
-says the command is not on any key, you must use @kbd{M-x} to run it.
-@kbd{C-h w} runs the command @code{where-is}.
-

   @kbd{C-h v} (@code{describe-variable}) is like @kbd{C-h f} but describes
 Lisp variables instead of Lisp functions.  Its default is the Lisp symbol
 around or before point, but only if that is the name of a known Lisp
   @kbd{C-h v} (@code{describe-variable}) is like @kbd{C-h f} but describes
 Lisp variables instead of Lisp functions.  Its default is the Lisp symbol
 around or before point, but only if that is the name of a known Lisp

-variable.  @xref{Variables}.@refill
+variable.  @xref{Variables}.

 
 

-  Help buffers describing variables or functions defined in Lisp
-normally have hyperlinks to the Lisp definition, if you have the Lisp
-source files installed.  If you know Lisp, this provides the ultimate
-documentation.  If you don't know Lisp, you should learn it.  If you
-are treating Emacs as an object file, then you are just @emph{using}
-Emacs.  For real intimacy with Emacs, you must read the source code.
+  Help buffers describing Emacs variables and functions normally have
+hyperlinks to the definition, if you have the source files installed.
+(@xref{Hyperlinking}.)  If you know Lisp (or C), this provides the
+ultimate documentation.  If you don't know Lisp, you should learn it.
+If you are just @emph{using} Emacs, treating Emacs as an object
+(file), then you don't really love it.  For true intimacy with your
+editor, you need to read the source code.

 
 @node Apropos
 @section Apropos
 
 @node Apropos
 @section Apropos


@@ -274,18 +275,19 @@ contain @samp{file}, including @code{copy-file}, @code{find-file}, and
 so on.  With each command name appears a brief description of how to use
 the command, and what keys you can currently invoke it with.  For
 example, it would say that you can invoke @code{find-file} by typing
 so on.  With each command name appears a brief description of how to use
 the command, and what keys you can currently invoke it with.  For
 example, it would say that you can invoke @code{find-file} by typing

-@kbd{C-x C-f}.  The @kbd{a} in @kbd{C-h a} stands for `Apropos';
+@kbd{C-x C-f}.  The @kbd{a} in @kbd{C-h a} stands for ``Apropos'';

 @kbd{C-h a} runs the command @code{apropos-command}.  This command
 normally checks only commands (interactive functions); if you specify a
 prefix argument, it checks noninteractive functions as well.
 
 @kbd{C-h a} runs the command @code{apropos-command}.  This command
 normally checks only commands (interactive functions); if you specify a
 prefix argument, it checks noninteractive functions as well.
 

-  Because @kbd{C-h a} looks only for functions whose names contain the
-string you specify, you must use ingenuity in choosing the
-string.  If you are looking for commands for killing backwards and
-@kbd{C-h a kill-backwards @key{RET}} doesn't reveal any, don't give up.
-Try just @kbd{kill}, or just @kbd{backwards}, or just @kbd{back}.  Be
-persistent.  Also note that you can use a regular expression as the
-argument, for more flexibility (@pxref{Regexps}).
+  Because @kbd{C-h a} looks only for commands matching the string you
+specify, you may not find what you want on the first try.  In that
+case, don't just give up.  You can give Apropos a list of words to
+search for.  When more than one word is specified, at least two of
+those words must be present for an item to match.  If you are looking
+for commands to kill a chunk of text before point, try @kbd{C-h a kill
+back behind before @key{RET}}.  For even greater flexibility, you can
+also supply a regular expression to Apropos (@pxref{Regexps}).

 
   Here is a set of arguments to give to @kbd{C-h a} that covers many
 classes of Emacs commands, since there are strong conventions for naming
 
   Here is a set of arguments to give to @kbd{C-h a} that covers many
 classes of Emacs commands, since there are strong conventions for naming


@@ -303,9 +305,9 @@ view, describe, default.
 
 @findex apropos-variable
   To list all user variables that match a regexp, use the command
 
 @findex apropos-variable
   To list all user variables that match a regexp, use the command

-@kbd{M-x apropos-variable}. This command shows only user variables and
-customization options by default; if you specify a prefix argument, it
-checks all variables.
+@kbd{M-x apropos-variable}.  By default, this command shows only
+variables meant for user customization; if you specify a prefix
+argument, it checks all variables.

 
 @findex apropos
   To list all Lisp symbols that contain a match for a regexp, not just
 
 @findex apropos
   To list all Lisp symbols that contain a match for a regexp, not just


@@ -329,9 +331,16 @@ check them.
   If the variable @code{apropos-do-all} is non-@code{nil}, the commands
 above all behave as if they had been given a prefix argument.
 
   If the variable @code{apropos-do-all} is non-@code{nil}, the commands
 above all behave as if they had been given a prefix argument.
 

+@vindex apropos-sort-by-scores
+@cindex apropos search results, order by score
+  By default, Apropos lists the search results in alphabetical order.
+If the variable @code{apropos-sort-by-scores} is non-@code{nil},
+Apropos tries to guess the relevance of each result, and displays the
+most relevant ones first.
+

   If you want more information about a function definition, variable or
 symbol property listed in the Apropos buffer, you can click on it with
   If you want more information about a function definition, variable or
 symbol property listed in the Apropos buffer, you can click on it with

-@kbd{Mouse-2} or move there and type @key{RET}.
+@kbd{Mouse-1} or @kbd{Mouse-2}, or move there and type @key{RET}.

 
 @node Library Keywords
 @section Keyword Search for Lisp Libraries
 
 @node Library Keywords
 @section Keyword Search for Lisp Libraries


@@ -342,52 +351,55 @@ The @kbd{C-h p} command lets you search the standard Emacs Lisp
 libraries by topic keywords.  Here is a partial list of keywords you can
 use:
 
 libraries by topic keywords.  Here is a partial list of keywords you can
 use:
 

-@display
-abbrev --- abbreviation handling, typing shortcuts, macros.
-bib --- support for the bibliography processor @code{bib}.
-c --- C and C++ language support.
-calendar --- calendar and time management support.
-comm --- communications, networking, remote access to files.
-data --- support for editing files of data.
-docs --- support for Emacs documentation.
-emulations --- emulations of other editors.
-extensions --- Emacs Lisp language extensions.
-faces --- support for using faces (fonts and colors; @pxref{Faces}).
-frames --- support for Emacs frames and window systems.
-games --- games, jokes and amusements.
-hardware --- support for interfacing with exotic hardware.
-help --- support for on-line help systems.
-hypermedia --- support for links within text, or other media types.
-i18n --- internationalization and alternate character-set support.
-internal --- code for Emacs internals, build process, defaults.
-languages --- specialized modes for editing programming languages.
-lisp --- support for using Lisp (including Emacs Lisp).
-local --- libraries local to your site.
-maint --- maintenance aids for the Emacs development group.
-mail --- modes for electronic-mail handling.
-matching --- searching and matching.
-news --- support for netnews reading and posting.
-non-text --- support for editing files that are not ordinary text.
-oop --- support for object-oriented programming.
-outlines --- hierarchical outlining.
-processes --- process, subshell, compilation, and job control support.
-terminals --- support for terminal types.
-tex --- support for the @TeX{} formatter.
-tools --- programming tools.
-unix --- front-ends/assistants for, or emulators of, Unix features.
-vms --- support code for VMS.
-wp --- word processing.
-@end display
+@multitable {emulations} {aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa}
+@item abbrev@tab abbreviation handling, typing shortcuts, macros.
+@item bib@tab code related to the @code{bib} bibliography processor.
+@item c@tab support for the C language and related languages.
+@item calendar@tab calendar and time management support.
+@item comm@tab communications, networking, remote access to files.
+@item convenience@tab convenience features for faster editing.
+@item data@tab support for editing files of data.
+@item docs@tab support for Emacs documentation.
+@item emulations@tab emulations of other editors.
+@item extensions@tab Emacs Lisp language extensions.
+@item faces@tab support for multiple fonts.
+@item files@tab support for editing and manipulating files.
+@item frames@tab support for Emacs frames and window systems.
+@item games@tab games, jokes and amusements.
+@item hardware@tab support for interfacing with exotic hardware.
+@item help@tab support for on-line help systems.
+@item hypermedia@tab support for links between text or other media types.
+@item i18n@tab internationalization and alternate character-set support.
+@item internal@tab code for Emacs internals, build process, defaults.
+@item languages@tab specialized modes for editing programming languages.
+@item lisp@tab Lisp support, including Emacs Lisp.
+@item local@tab code local to your site.
+@item maint@tab maintenance aids for the Emacs development group.
+@item mail@tab modes for electronic-mail handling.
+@item matching@tab various sorts of searching and matching.
+@item mouse@tab mouse support.
+@item multimedia@tab images and sound support.
+@item news@tab support for netnews reading and posting.
+@item oop@tab support for object-oriented programming.
+@item outlines@tab support for hierarchical outlining.
+@item processes@tab process, subshell, compilation, and job control support.
+@item terminals@tab support for terminal types.
+@item tex@tab supporting code for the @TeX{} formatter.
+@item tools@tab programming tools.
+@item unix@tab front-ends/assistants for, or emulators of, UNIX-like features.
+@item wp@tab word processing.
+@end multitable

 
 @node Language Help
 @section Help for International Language Support
 
   You can use the command @kbd{C-h L}
 
 @node Language Help
 @section Help for International Language Support
 
   You can use the command @kbd{C-h L}

-(@code{describe-language-environment}) to find out the support for a
-specific language environment.  @xref{Language Environments}.  This
-tells you which languages this language environment is useful for, and
-lists the character sets, coding systems, and input methods that go with
-it.  It also shows some sample text to illustrate scripts.
+(@code{describe-language-environment}) to find out information about
+the support for a specific language environment.  @xref{Language
+Environments}.  This tells you which languages this language
+environment is useful for, and lists the character sets, coding
+systems, and input methods that go with it.  It also shows some sample
+text to illustrate scripts.

 
   The command @kbd{C-h h} (@code{view-hello-file}) displays the file
 @file{etc/HELLO}, which shows how to say ``hello'' in many languages.
 
   The command @kbd{C-h h} (@code{view-hello-file}) displays the file
 @file{etc/HELLO}, which shows how to say ``hello'' in many languages.


@@ -403,30 +415,33 @@ the ones currently in use.  @xref{Coding Systems}.
 @node Help Mode
 @section Help Mode Commands
 
 @node Help Mode
 @section Help Mode Commands
 

-  Help buffers provide the commands of View mode (@pxref{Misc File
+  Help buffers provide the same commands as View mode (@pxref{Misc File

 Ops}), plus a few special commands of their own.
 
 @table @kbd
 @item @key{SPC}
 Scroll forward.
 @item @key{DEL}
 Ops}), plus a few special commands of their own.
 
 @table @kbd
 @item @key{SPC}
 Scroll forward.
 @item @key{DEL}

-Scroll backward.
+@itemx @key{BS}
+Scroll backward.  On some keyboards, this key is known as @key{BS} or
+@key{backspace}.

 @item @key{RET}
 Follow a cross reference at point.
 @item @key{TAB}
 Move point forward to the next cross reference.
 @item S-@key{TAB}
 Move point back to the previous cross reference.
 @item @key{RET}
 Follow a cross reference at point.
 @item @key{TAB}
 Move point forward to the next cross reference.
 @item S-@key{TAB}
 Move point back to the previous cross reference.

-@item Mouse-2
+@item Mouse-1
+@itemx Mouse-2

 Follow a cross reference that you click on.
 @end table
 
 Follow a cross reference that you click on.
 @end table
 

-  When a command name (@pxref{M-x,, Running Commands by Name}) or
+  When a function name (@pxref{M-x,, Running Commands by Name}) or

 variable name (@pxref{Variables}) appears in the documentation, it
 variable name (@pxref{Variables}) appears in the documentation, it

-normally appears inside paired single-quotes.  You can click on the name
-with @kbd{Mouse-2}, or move point there and type @key{RET}, to view the
-documentation of that command or variable.  Use @kbd{C-c C-b} to retrace
-your steps.
+normally appears inside paired single-quotes.  You can click on the
+name with @kbd{Mouse-1} or @kbd{Mouse-2}, or move point there and type
+@key{RET}, to view the documentation of that command or variable.  Use
+@kbd{C-c C-b} to retrace your steps.

 
 @kindex @key{TAB} @r{(Help mode)}
 @findex help-next-ref
 
 @kindex @key{TAB} @r{(Help mode)}
 @findex help-next-ref


@@ -451,42 +466,62 @@ is available within Info.  Eventually all the documentation of the GNU
 system will be available.  Type @kbd{h} after entering Info to run
 a tutorial on using Info.
 
 system will be available.  Type @kbd{h} after entering Info to run
 a tutorial on using Info.
 

-  If you specify a numeric argument, @kbd{C-h i} prompts for the name of
-a documentation file.  This way, you can browse a file which doesn't
+@cindex find Info manual by its file name
+  With a numeric argument, @kbd{C-h i} selects an Info buffer with the
+number appended to the default @samp{*info*} buffer name
+(e.g. @samp{*info*<2>}).  This is useful if you want to browse
+multiple Info manuals simultaneously.  If you specify just @kbd{C-u}
+as the prefix argument, @kbd{C-h i} prompts for the name of a
+documentation file.  This way, you can browse a file which doesn't

 have an entry in the top-level Info menu.  It is also handy when you
 have an entry in the top-level Info menu.  It is also handy when you

-need to get to the documentation quickly, and you know the exact name of
-the file.
+need to get to the documentation quickly, and you know the exact name
+of the file.

 
 

-@kindex C-h C-f
-@kindex C-h C-k
+@kindex C-h F
+@kindex C-h K

 @findex Info-goto-emacs-key-command-node
 @findex Info-goto-emacs-command-node
 @findex Info-goto-emacs-key-command-node
 @findex Info-goto-emacs-command-node

-  There are two special help commands for accessing Emacs documentation
-through Info.  @kbd{C-h C-f @var{function} @key{RET}} enters Info and
-goes straight to the documentation of the Emacs function
-@var{function}.  @kbd{C-h C-k @var{key}} enters Info and goes straight
-to the documentation of the key @var{key}.  These two keys run the
-commands @code{Info-goto-emacs-command-node} and
-@code{Info-goto-emacs-key-command-node}.
-
-  When editing a program, if you have an Info version of the manual for
-the programming language, you can use the command @kbd{C-h C-i} to refer
-to the manual documentation for a symbol (keyword, function or
-variable).  The details of how this command works depend on the major
-mode.
+  There are two special help commands for accessing Emacs
+documentation through Info.  @kbd{C-h F @var{function} @key{RET}}
+enters Info and goes straight to the documentation of the Emacs
+function @var{function}.  @kbd{C-h K @var{key}} enters Info and goes
+straight to the documentation of the key @var{key}.  These two keys
+run the commands @code{Info-goto-emacs-command-node} and
+@code{Info-goto-emacs-key-command-node}.  You can use @kbd{C-h K} to
+find the documentation of a menu item: just select that menu item when
+@kbd{C-h K} prompts for a key.
+
+  @kbd{C-h F} and @kbd{C-h K} know about commands and keys described
+in manuals other than the Emacs manual.  Thus, they make it easier to
+find the documentation of commands and keys when you are not sure
+which manual describes them, like when using some specialized mode.
+
+@kindex C-h S
+@findex info-lookup-symbol
+  When editing a program, if you have an Info version of the manual
+for the programming language, you can use the command @kbd{C-h S}
+(@code{info-lookup-symbol}) to refer to the manual documentation for a
+symbol (keyword, function or variable).  The details of how this
+command works depend on the major mode.

 
 @kindex C-h l
 @findex view-lossage
   If something surprising happens, and you are not sure what commands you
 
 @kindex C-h l
 @findex view-lossage
   If something surprising happens, and you are not sure what commands you

-typed, use @kbd{C-h l} (@code{view-lossage}).  @kbd{C-h l} prints the last
+typed, use @kbd{C-h l} (@code{view-lossage}).  @kbd{C-h l} displays the last

 100 command characters you typed in.  If you see commands that you don't
 know, you can use @kbd{C-h c} to find out what they do.
 
 100 command characters you typed in.  If you see commands that you don't
 know, you can use @kbd{C-h c} to find out what they do.
 

+@kindex C-h e
+@findex view-echo-area-messages
+  To review messages that recently appeared in the echo area, use
+@kbd{C-h e} (@code{view-echo-area-messages}).  This displays the
+buffer @code{*Messages*}, where those messages are kept.
+

 @kindex C-h m
 @findex describe-mode
   Emacs has numerous major modes, each of which redefines a few keys and
 makes a few other changes in how editing works.  @kbd{C-h m}
 @kindex C-h m
 @findex describe-mode
   Emacs has numerous major modes, each of which redefines a few keys and
 makes a few other changes in how editing works.  @kbd{C-h m}

-(@code{describe-mode}) prints documentation on the current major mode,
+(@code{describe-mode}) displays documentation on the current major mode,

 which normally describes all the commands that are changed in this
 mode.
 
 which normally describes all the commands that are changed in this
 mode.
 


@@ -495,7 +530,7 @@ mode.
   @kbd{C-h b} (@code{describe-bindings}) and @kbd{C-h s}
 (@code{describe-syntax}) present other information about the current
 Emacs mode.  @kbd{C-h b} displays a list of all the key bindings now in
   @kbd{C-h b} (@code{describe-bindings}) and @kbd{C-h s}
 (@code{describe-syntax}) present other information about the current
 Emacs mode.  @kbd{C-h b} displays a list of all the key bindings now in

-effect; the local bindings defined by the current minor modes first,
+effect, showing the local bindings defined by the current minor modes first,

 then the local bindings defined by the current major mode, and finally
 the global bindings (@pxref{Key Bindings}).  @kbd{C-h s} displays the
 contents of the syntax table, with explanations of each character's
 then the local bindings defined by the current major mode, and finally
 the global bindings (@pxref{Key Bindings}).  @kbd{C-h s} displays the
 contents of the syntax table, with explanations of each character's


@@ -507,45 +542,80 @@ this does not work---those that provide their own bindings for
 @kbd{C-h}.  One of these is @key{ESC}, because @kbd{@key{ESC} C-h} is
 actually @kbd{C-M-h}, which marks a defun.)
 
 @kbd{C-h}.  One of these is @key{ESC}, because @kbd{@key{ESC} C-h} is
 actually @kbd{C-M-h}, which marks a defun.)
 

-@kindex C-h F
-@findex view-emacs-FAQ
-@kindex C-h n
-@findex view-emacs-news
+@node Help Files
+@section Help Files
+
+  The Emacs help commands described above display the state of data
+bases within Emacs.  Emacs has a few other help commands that display
+pre-written help files.  These commands all have the form @kbd{C-h
+C-@var{char}}; that is, @kbd{C-h} followed by a control character.
+

 @kindex C-h C-c
 @findex describe-copying
 @kindex C-h C-d
 @findex describe-distribution
 @kindex C-h C-c
 @findex describe-copying
 @kindex C-h C-d
 @findex describe-distribution

-@kindex C-h C-w
-@findex describe-no-warranty
+@kindex C-h C-e
+@findex view-emacs-problems
+@kindex C-h C-f
+@findex view-emacs-FAQ
+@kindex C-h C-n
+@findex view-emacs-news

 @kindex C-h C-p
 @findex describe-project
 @kindex C-h C-p
 @findex describe-project

-@kindex C-h P
-@findex view-emacs-problems
-  The other @kbd{C-h} options display various files of useful
-information.  @kbd{C-h C-w} displays the full details on the complete
-absence of warranty for GNU Emacs.  @kbd{C-h n} (@code{view-emacs-news})
-displays the file @file{emacs/etc/NEWS}, which contains documentation on
-Emacs changes arranged chronologically.  @kbd{C-h F}
-(@code{view-emacs-FAQ}) displays the Emacs frequently-answered-questions
-list.  @kbd{C-h t} (@code{help-with-tutorial}) displays the
-learn-by-doing Emacs tutorial.  @kbd{C-h C-c} (@code{describe-copying})
-displays the file @file{emacs/etc/COPYING}, which tells you the
-conditions you must obey in distributing copies of Emacs.  @kbd{C-h C-d}
-(@code{describe-distribution}) displays the file
-@file{emacs/etc/DISTRIB}, which tells you how you can order a copy of
-the latest version of Emacs.  @kbd{C-h C-p} (@code{describe-project})
-displays general information about the GNU Project.  @kbd{C-h P}
-(@code{view-emacs-problems}) displays the file
-@file{emacs/etc/PROBLEMS}, which lists known problems with Emacs in
-various situations with solutions or workarounds in many cases.
+@kindex C-h C-t
+@findex view-emacs-todo
+@kindex C-h C-w
+@findex describe-no-warranty
+  The other @kbd{C-h} options display various files containing useful
+information.
+
+@table @kbd
+@item C-h C-c
+Displays the Emacs copying conditions (@code{describe-copying}).
+These are the rules under which you can copy and redistribute Emacs.
+@item C-h C-d
+Displays information on how to download or order the latest version of
+Emacs and other GNU software (@code{describe-distribution}).
+@item C-h C-e
+Displays the list of known Emacs problems, sometimes with suggested
+workarounds (@code{view-emacs-problems}).
+@item C-h C-f
+Displays the Emacs frequently-answered-questions list (@code{view-emacs-FAQ}).
+@item C-h C-n
+Displays the Emacs ``news'' file, which lists new Emacs features, most
+recent first (@code{view-emacs-news}).
+@item C-h C-p
+Displays general information about the GNU Project
+(@code{describe-project}).
+@item C-h C-t
+Displays the Emacs to-do list (@code{view-todo}).
+@item C-h C-w
+Displays the full details on the complete absence of warranty for GNU
+Emacs (@code{describe-no-warranty}).
+@end table

 
 @node Help Echo
 @section Help on Active Text and Tooltips
 
 @cindex tooltips
 
 @node Help Echo
 @section Help on Active Text and Tooltips
 
 @cindex tooltips

-@cindex ballon help
-Often when a region of text is `active' so that you can select it with
-the mouse or a key like @kbd{RET}, it has associated help text.  Areas
-of the mode line are examples.  This help will normally be printed in
-the echo area when you move point into the active text.  In a window
-system you can display the help text as `tooltips'.  @xref{Tooltips}.
+@cindex balloon help
+  When a region of text is ``active,'' so that you can select it with
+the mouse or a key like @kbd{RET}, it often has associated help text.
+Areas of the mode line are examples.  On most window systems, the help
+text is displayed as a ``tooltip'' (sometimes known as ``balloon
+help'').  @xref{Tooltips}.  Otherwise, it is shown in the echo area
+when you move point into the active text.
+
+@kindex C-h .
+@findex display-local-help
+@vindex help-at-pt-display-when-idle
+  You can also access text region help info using the keyboard.  The
+command @kbd{C-h .} (@code{display-local-help}) displays any help text
+associated with the text at point, using the echo area.  If you want
+help text to be displayed automatically whenever it is available at
+point, set the variable @code{help-at-pt-display-when-idle} to
+@code{t}.
+
+@ignore
+   arch-tag: 6f33ab62-bc75-4367-8057-fd67cc15c3a1
+@end ignore