@c =============================================================
@c = $B85(B $BK](B $BLu(B: $BEDCfAo!wEl5~=w;RBg3X(B
@c = $B2CI.=$@5(B: $BBgLZFXM:!wBgDM(B.$BC^GHBg3X(B = 1998/11/25
@c = 20.4$B2~D{(B: $BBgLZFXM:!wBgDM(B.$BC^GHBg3X(B = 1999/09/12
@c =============================================================
@c This is part of the Emacs manual.
@c Copyright (C) 1997, 1999 Free Software Foundation, Inc.
@c See file emacs.texi for copying conditions.

@node Antinews, MS-DOS, Command Arguments, Top
@c @appendix Emacs 19 Antinews
@appendix Emacs 19$B5U8~$-%K%e!<%9(B

@c   For those users who live backwards in time, here is information about
@c downgrading to Emacs version 19.  We hope you will enjoy the greater
@c simplicity that results from the absence of certain Emacs 20 features.
$B2a5n$KJk$9J}!9$N$?$a$K!"(BEmacs$B%P!<%8%g%s(B19$B$X$N3J2<$2>pJs$G$9!#(B
Emacs 20$B$N$"$k<o$N5!G=$N7gMn$K$h$kBg$$$J$k4J7i$5$r4E<u$5$l$k$3$H$r4j$C$F!#(B

@itemize @bullet
@item
@c The multibyte character and end-of-line conversion support have been
@c eliminated entirely.  (Some users consider this a tremendous
@c improvement.)  Character codes are limited to the range 0 through 255
@c and files imported onto Unix-like systems may have a ^M at the end of
@c each line to remind you to control MS-DOG type files.
$B%^%k%A%P%$%HJ8;zBP1~$H9TKvJQ495!G=$O40A4$K=|5n$7$F$"$k!#(B
$B!J$3$l$r$H$F$D$b$J$$?JJb$H$H$i$($k?M$b$$$k!#!K(B
$BJ8;z%3!<%I$O(B0$B$+$i(B255$B$NHO0O$K8B$i$l$k!#(B
$B$^$?!"(BUNIX$BN.$N%7%9%F%`$K;}$A9~$s$@%U%!%$%k$G$O!"(B
MS-DOG$B7?$N%U%!%$%k$r07$C$F$$$k$3$H$r7Y9p$9$k$?$a$K!"(B
$B3F9T$NKvHx$K(B^M$B$,$"$k$3$H$,$"$k!#(B

@item
@c Fontsets, coding systems and input methods have been eliminated as well.
$BF1MM$K!"%U%)%s%H%;%C%H!"%3!<%G%#%s%0%7%9%F%`!"F~NOJ}<0$b=|5n$7$?!#(B

@item
@c The mode line normally displays the string @samp{Emacs}, in case you
@c forget what editor you are using.
$B$I$N%(%G%#%?$r;H$C$F$$$k$+K:$l$J$$$h$&$K!"(B
$BDL>o!"%b!<%I9T$K$O(B@samp{Emacs}$B$HI=<($9$k!#(B

@item
@c Scroll bars always appear on the right-hand side of the window.
@c This clearly separates them from the text in the window.
$B%9%/%m!<%k%P!<$O$D$M$K%&%#%s%I%&$N1&B&$K$"$k!#(B
$B$3$l$G!"%&%#%s%I%&Fb$N%F%-%9%H$H$O$C$-$j6hJL$G$-$k!#(B

@item
@c The @kbd{M-x customize} feature has been replaced with a very simple
@c feature, @kbd{M-x edit-options}.  This shows you @emph{all} the user
@c options right from the start, so you don't have to hunt for the ones you
@c want.  It also provides a few commands, such as @kbd{s} and @kbd{x}, to
@c set a user option.
@kbd{M-x customize}$B$N5!G=$O!"(B
$B$H$F$b4J7i$J5!G=$N(B@kbd{M-x edit-options}$B$KCV$-49$($?!#(B
$B$3$l$G(B@emph{$B$9$Y$F(B}$B$N%f!<%6!<%*%W%7%g%s$r@hF,$+$iD/$a$k$3$H$,$G$-!"(B
$B$"$A$3$AC5$7$^$o$kI,MW$O$J$$$@$m$&!#(B
$B$^$?!"$3$l$K$O(B@kbd{s}$B$d(B@kbd{x}$B$N$h$&$K%f!<%6!<%*%W%7%g%s$r(B
$B@_Dj$9$k%3%^%s%I$b$$$/$D$+$"$k!#(B

@item
@c The @key{DELETE} key does nothing special in Emacs 19 when you use it
@c after selecting a region with the mouse.  It does exactly the same thing
@c in that situation as it does at all other times: delete one character
@c backwards.
Emacs19$B$G$O!"%^%&%9$G%j!<%8%g%s$rA*Br$7$?$"$H$K(B
@key{DELETE}$B%-!<$r;H$C$F$bFCJL$J$3$H$O2?$b5/$3$i$J$$!#(B
$B%^%&%9$rA`:n$7$F$$$J$$$H$-$HF1$8$h$&$KF0:n$7!"C1$KD>A0$N(B1$BJ8;z$r:o=|$9$k!#(B

@item
@c @kbd{C-x C-w} no longer changes the major mode according to the new file
@c name.  If you want to change the mode, use @kbd{M-x normal-mode}.
@kbd{C-x C-w}$B$O!"?7$7$$%U%!%$%kL>$K9g$o$;$F%a%8%c!<%b!<%I$rJQ99$7$J$$!#(B
$B%b!<%I$rJQ99$9$k$K$O!"(B@kbd{M-x normal-mode}$B$r;H$&!#(B

@item
@c In Transient Mark mode, each window displays highlighting for the region
@c as it exists in that window.
$B;CDj!J(Btransient-mark$B!K%^!<%/%b!<%I$G$O!"$I$N%&%#%s%I%&$K$*$$$F$b(B
$B%&%#%s%I%&Fb$K%j!<%8%g%s$,$"$k8B$j$=$l$r6/D4I=<($9$k!#(B

@item
@c Outline mode doesn't use overlay properties; instead, it hides a line by
@c converting the preceding newline into code 015.  Magically, however, if
@c you save the file, the 015 character appears in the file as a newline.
$B%"%&%H%i%$%s!J(Boutline$B!K%b!<%I$G$O!">e=q$-B0@-$r;H$o$J$$!#(B
$B$+$o$j$K!"$^$($K$"$k2~9TJ8;z$r%3!<%I(B015$B$KJQ99$7$F9T$r1#$9!#(B
$B$?$H$($3$N$^$^%U%!%$%k$KJ]B8$7$F$b!"(B
$B%U%!%$%kFb$G$OJ8;z%3!<%I(B015$B$O2~9T$KLa$C$F$$$k!#(B

@item
@c There is now a clever way you can activate the minibuffer recursively
@c even if @code{enable-recursive-minibuffers} is @code{nil}.  All you have
@c to do is @emph{switch windows} to a non-minibuffer window, and then use a
@c minibuffer command.  You can pile up any number of minibuffer levels
@c this way, but @kbd{M-x top-level} will get you out of all of them.
@code{enable-recursive-minibuffers}$B$,(B@code{nil}$B$G$"$C$F$b!"(B
$B%_%K%P%C%U%!$r:F5"E*$KMxMQ$9$k8-$$J}K!$,$"$k!#(B
$B%_%K%P%C%U%!0J30$N(B@emph{$B%&%#%s%I%&$K@Z$jBX$((B}$B$F$+$i!"(B
$B%_%K%P%C%U%!%3%^%s%I$r;H$&$@$1$G$h$$!#(B
$B$3$N$h$&$K$9$l$P2?CJ$G$b%_%K%P%C%U%!$N%l%Y%k$r@Q$_=E$M$i$l$k$,!"(B
@kbd{M-x top-level}$B$G$b$H$KLa$C$F$7$^$&!#(B

@item
@c We have removed the limit on the length of minibuffer history lists;
@c they now contain all the minibuffer arguments you have used since the
@c beginning of the session.
$B%_%K%P%C%U%!MzNr%j%9%H$ND9$5$N@)8B$r<h$j=|$$$?!#(B
$B$3$N%j%9%H$O!"(B
$B%;%C%7%g%s3+;O;~$+$iF~NO$7$?$9$Y$F$N%_%K%P%C%U%!0z?t$rJ];}$9$k!#(B

@item
@c Dynamic abbrev expansion now handles case conversion in a very simple
@c and straightforward way.  If you have requested preserving case, it
@c always converts the entire expansion to the case pattern of the abbrev
@c that you have typed in.
$BF0E*N,8lE83+$G$O!"$H$F$b4J7i$K$+$DAGD>$KBgJ8;z>.J8;zJQ49$r07$&!#(B
$BBgJ8;z>.J8;z$rJ]B8$9$k$h$&$K;XDj$7$F$"$k$H!"(B
$BBG$A9~$s$@N,8l$NBgJ8;z>.J8;z$N%Q%?!<%s$HF1$8$K$J$k$h$&$KE83+$9$k!#(B

@item
@c The @code{compose-mail} command does not exist; @kbd{C-x m} now
@c runs @code{mail} directly.
$B%3%^%s%I(B@code{compose-mail}$B$O$J$/$J$C$?!#(B
$B8=:_!"(B@kbd{C-x m}$B$O(B@code{mail}$B$rD>@\<B9T$9$k!#(B

@item
@c There is no way to quote a file name with special characters in it.
@c What you see is what you get: if the name looks remote, it is remote.
$BFC<lJ8;z$r4^$`%U%!%$%kL>$r%/%)!<%H$9$kJ}K!$O$J$$!#(B
$B8+$?L\$H$*$j$N$b$N$rF@$k!#(B
$B$D$^$j!"%j%b!<%H$K$"$k$h$&$K8+$($kL>A0$N$b$N$O%j%b!<%H$K$"$k!#(B

@item
@c @kbd{M-x grep-find} has been eliminated, because @code{grep} has never
@c been lost.
@code{grep}$B$,$J$/$J$k$3$H$O$J$$$N$G!"(B@kbd{M-x grep-find}$B$O=|5n$7$?!#(B

@ignore
@item
Truth in advertising: @kbd{M-x grep} by default uses @code{grep}, the
whole @code{grep}, and nothing but the @code{grep}.  If you want it to
use @code{zgrep}, you'll have to edit the search command by hand.
@end ignore

@item
@c Some Dired commands have been rearranged: two-character sequences
@c have been replaced with quick single-character commands:
dired$B$N%3%^%s%I$r<c43:FG[CV$7$?!#(B
$B$D$^$j!"(B2$BJ8;zNs$N%3%^%s%I$O7Z2w$J(B1$BJ8;z$N%3%^%s%I$KCV$-49$($?!#(B

@itemize @bullet
@item
@c For @code{dired-mark-executables}, type @kbd{*}.
@code{dired-mark-executables}$B$O(B@kbd{*}
@item
@c For @code{dired-mark-directories}, type @kbd{/}.
@code{dired-mark-directories}$B$O(B@kbd{/}
@item
@c For @code{dired-mark-symlinks}, type @kbd{@@}.
@code{dired-mark-symlinks}$B$O(B@kbd{@@}
@item
@c For @code{dired-change-marks}, type @kbd{c}.
@code{dired-change-marks}$B$O(B@kbd{c}
@item
@c For @code{dired-unmark-all-files}, type @kbd{C-M-?}.
@code{dired-unmark-all-files}$B$O(B@kbd{C-M-?}
@item
@c For @code{dired-unmark-all-marks}, type @kbd{C-M-? @key{RET}}.
@code{dired-unmark-all-marks}$B$O(B@kbd{C-M-? @key{RET}}
@end itemize

@c But if you want to use @code{dired-flag-garbage-files}, @kbd{&}, you'll
@c just have to stop living in the past.
$B$?$@$7!"(B@code{dired-flag-garbage-files}$B$O(B@kbd{&}$B$HBG$D$N$G!"(B
$B$3$N>l9g$K$O2a5n$K$R$?$C$F$$$i$l$J$/$J$k!#(B

@item 
@c In C mode, you can now specify your preferred style for block comments.
@c If you want to use the style
C$B%b!<%I$G$O!"%V%m%C%/%3%a%s%H$K9%$-$J%9%?%$%k$r;XDj$G$-$k!#(B
$B$?$H$($P!"(B

@example
/*       
blah     
blah     
*/       
@end example

@noindent
$B$H$$$&%9%?%$%k$rMxMQ$9$k$K$O!"(B
@c then you should set the variable @code{c-block-comments-indent-p} to
@c @code{t}.
$BJQ?t(B@code{c-block-comments-indent-p}$B$r(B@code{t}$B$K$9$k!#(B

@item
@c To customize faces used by Font Lock mode, use the variable
@c @code{font-lock-face-attributes}.  See its documentation string for
@c details.
$B%U%)%s%H%m%C%/!J(Bfont-lock$B!K%b!<%I$,;HMQ$9$k%U%'%$%9$r%+%9%?%^%$%:$9$k$K$O!"(B
$BJQ?t(B@code{font-lock-face-attributes}$B$r;H$&!#(B
$B>\$7$/$O!"$3$NJQ?t$N@bL@J8;zNs$r;2>H!#(B

@item
@c For efficiency, Font Lock mode now uses by default the minimum supported
@c level of decoration for the selected major mode.
$B8zN($N$?$a$K!"%U%)%s%H%m%C%/!J(Bfont-lock$B!K%b!<%I$O!"(B
$BA*Br$7$?%a%8%c!<%b!<%IMQ$N>~$j$H$7$F$O:G>.8B$N$b$N$r%G%U%)%k%H$G;HMQ$9$k!#(B

@item
@c If you kill a buffer, any registers holding saved positions in that
@c buffer are changed to point into limbo.
$B%P%C%U%!$r>C5n$9$k$H!"$=$N%P%C%U%!Fb$N0LCV$rJ];}$7$F$$$?%l%8%9%?$NCM$O!"(B
$BO49v$r;X$9$h$&$K$J$k!#(B

@item
@c The function @code{set-frame-font} has been renamed to
@c @code{set-default-font}.
$B4X?t(B@code{set-frame-font}$B$O(B@code{set-default-font}$B$H2~L>$7$?!#(B

@item
@c The variable @code{tex-main-file} doesn't exist.  Of course, you can
@c create the variable by setting it, but that won't do anything special.
$BJQ?t(B@code{tex-main-file}$B$O$J$/$J$C$?!#(B
$B$b$A$m$s!"CM$r@_Dj$9$l$P$3$NJQ?t$r:n@.$G$-$k$,!"FC$K2?$r$9$k$o$1$G$b$J$$!#(B

@item
@c The @code{scroll-preserve-screen-position} variable has been eliminated;
@c and so has the feature that it controls.
$BJQ?t(B@code{scroll-preserve-screen-position}$B$H(B
$B$3$NJQ?t$G@)8f$7$F$$$?5!G=$O=|5n$7$?!#(B

@item
@c We have eliminated the functions @code{add-untranslated-filesystem} and
@c @code{remove-untranslated-filesystem}, and replaced them with a simpler
@c function, @code{using-unix-filesystems}.
$B4X?t(B@code{add-untranslated-filesystem}$B$H(B
$B4X?t(B@code{remove-untranslated-filesystem}$B$O=|5n$7!"(B
$B$h$j4J7i$J4X?t(B@code{using-unix-filesystems}$B$GCV$-49$($?!#(B

@item
@c To keep up with decreasing computer memory capacity, many other
@c functions and files have been eliminated in Emacs 19.  There's no need
@c to mention them all here.  If you try to use one of them, you'll get an
@c error message to tell you that it is undefined or unbound.
$B%3%s%T%e!<%?$N5-21MFNL$,8:>/$7B3$1$k$?$a!"(B
Emacs 19$B$G$OB>$N?tB?$/$N4X?t$d%U%!%$%k$b=|5n$7$?!#(B
$B$=$l$i$r$9$Y$F$3$3$G<h$j>e$2$kI,MW$O$"$k$^$$!#(B
$B$=$l$i$N$I$l$+$r;H$&$H!"!V(Bundefined$B!JL$Dj5A!K!W$H$+(B
$B!V(Bunbound$B!JL$B+G{!K!W$H$$$&%(%i!<%a%C%;!<%8$,=P$k!#(B
@end itemize