man/anti.texi

   1 @c This is part of the Emacs manual.
   2 @c Copyright (C) 2005 Free Software Foundation, Inc.
   3 @c See file emacs.texi for copying conditions.
   4
   5 @node Antinews, Mac OS, X Resources, Top
   6 @appendix Emacs 21 Antinews
   7
   8   For those users who live backwards in time, here is information about
   9 downgrading to Emacs version 21.4.  We hope you will enjoy the greater
  10 simplicity that results from the absence of many Emacs @value{EMACSVER}
  11 features.
  12
  13 @itemize @bullet
  14
  15 @item
  16 The buffer position and line number are now displayed at the end of
  17 the mode line, where they can be more easily seen.
  18
  19 @item
  20 The mode line of the selected window is no longer displayed with a
  21 special face.  All mode lines are created equal.  Meanwhile, you can
  22 use the variable @code{mode-line-inverse-video} to control whether
  23 mode lines are highlighted at all---@code{nil} means don't highlight
  24 them.
  25
  26 @item
  27 Clicking on a link with the left mouse button (@kbd{mouse-1}) will
  28 always set point at the position clicked, instead of following the
  29 link.  If you want to follow the link, use the middle mouse button
  30 (@kbd{mouse-2}).
  31
  32 @item
  33 Emacs is tired of X droppings.  If you drop a file or a piece of text
  34 onto an Emacs window, nothing will happen.
  35
  36 @item
  37 On an xterm, Emacs provides a more convincing simulation of a text
  38 terminal by not responding to mouse-clicks on the mode-line,
  39 header-line, or display margin.
  40
  41 @item
  42 For simplicity, windows always have fringes.  We wouldn't want to
  43 in-fringe anyone's windows.  Likewise, horizontal scrolling always
  44 works in the same automatic way.
  45
  46 @item
  47 The horizontal-bar cursor shape has been removed.
  48
  49 @item
  50 If command line arguments are given, Emacs will not display a splash
  51 screen, so that you can immediately get on with your editing.  The
  52 command-line option @samp{--no-splash} is therefore obsolete, and has
  53 been removed.
  54
  55 @item
  56 The command line options @samp{--color}, @samp{--fullwidth},
  57 @samp{--fullheight}, @samp{--fullscreen}, @samp{--no-blinking-cursor},
  58 @samp{--no-desktop}, and @samp{-Q} have also been removed.
  59
  60 @item
  61 The @samp{--geometry} option applies only to the initial frame, and
  62 the @samp{-f} option will not read arguments for interactive
  63 functions.
  64
  65 @item
  66 We have standardized on one location for the user init file: the file
  67 named @file{.emacs} in your home directory.  Emacs will not look for
  68 the init file in @file{~/.emacs.d/init.el}.  Similarly, don't try
  69 putting @file{.emacs_SHELL} in @file{~/.emacs.d}; Emacs won't find it.
  70
  71 @item
  72 Emacs will not read @file{~/.abbrev_defs} automatically.  If you want
  73 to load abbrev definitions from a file, you must always do so
  74 explicitly.
  75
  76 @item
  77 When you are logged in as root, all files now give you writable
  78 buffers, reflecting the fact that you can write any files.
  79
  80 @item
  81 The maximum size of buffers and integer variables has been halved.  On
  82 32-bit machines, the maximum buffer size is now 128 megabytes.
  83
  84 @item
  85 An unquoted @samp{$} in a file name is now an error, if the following
  86 name is not recognized as an environment variable.  Thus,
  87 the file name @file{foo$bar} would probably be an error.  Meanwhile,
  88 the @code{setenv} command does not expand @samp{$} at all.
  89
  90 @item
  91 Emacs will not query you if a command accumulates too much undo
  92 information.  If Emacs runs out of memory as a result, it will handle
  93 this by crashing.
  94
  95 @item
  96 Many commands have been removed from the menus or rearranged.
  97
  98 @item
  99 The @kbd{C-h} (help) subcommands have been rearranged---especially
 100 those that display specific files.  Type @kbd{C-h C-h} to see a list
 101 of these commands; that will show you what is different.
 102
 103 @item
 104 The @kbd{C-h v} and @kbd{C-h f} commands no longer show a hyperlink to
 105 the C source code, even if it is available.  If you want to find the
 106 source code, grep for it.
 107
 108 @item
 109 The apropos commands will not accept a list of words to match, in
 110 order to encourage users to be more specific.  Also, the user option
 111 @code{apropos-sort-by-scores} has been removed.
 112
 113 @item
 114 The minibuffer prompt is now displayed using the default face.
 115 The colon is enough to show you what part is the prompt.
 116
 117 @item
 118 Minibuffer completion commands always complete the entire minibuffer
 119 contents, just as if you had typed them at the end of the minibuffer,
 120 no matter where point is actually located.
 121
 122 @item
 123 The command @code{backward-kill-sexp} is now bound to @kbd{C-M-delete}
 124 and @kbd{C-M-backspace}.  Be careful when using these key sequences!
 125 It may shut down your X server, or reboot your operating system.
 126
 127 @item
 128 Commands to set the mark at a place away from point, including
 129 @kbd{M-@@}, @kbd{M-h}, etc., don't do anything special when you repeat
 130 them.  In most cases, typing these commands multiple times is
 131 equivalent to typing them once.  @kbd{M-h} ignores numeric arguments.
 132
 133 @item
 134 If you want to repeat a jump to a previous mark, you should supply the
 135 prefix argument explicitly.  So, instead of typing @kbd{C-u C-SPC
 136 C-SPC C-SPC}, type @kbd{C-u C-SPC C-u C-SPC C-u C-SPC}.
 137
 138 @item
 139 @kbd{C-@key{SPC} C-@key{SPC}} has no special meaning--it just sets the
 140 mark twice.  Neither does @kbd{C-u C-x C-x}, which simply exchanges
 141 point and mark like @kbd{C-x C-x}.
 142
 143 @item
 144 The function @code{sentence-end} has been eliminated in favor of a
 145 more straightforward approach: directly setting the variable
 146 @code{sentence-end}.  For example, to end each sentence with a single
 147 space, use
 148
 149 @lisp
 150 (setq sentence-end "[.?!][]\"')@}]*\\($\\|[ \t]\\)[ \t\n]*")
 151 @end lisp
 152
 153 @item
 154 The variable @code{fill-nobreak-predicate} is no longer customizable,
 155 and it can only hold a single function.
 156
 157 @item
 158 Nobreak spaces and hyphens are displayed just like normal characters,
 159 and the user option @code{nobreak-char-display} has been removed.
 160
 161 @item
 162 @kbd{C-w} in an incremental search always grabs an entire word
 163 into the search string.  More precisely, it grabs text through
 164 the next end of a word.
 165
 166 @item
 167 Yanking now preserves all text properties that were in the killed
 168 text.  The variable @code{yank-excluded-properties} has been removed.
 169
 170 @item
 171 Occur mode, Info mode, and Comint-derived modes now control
 172 fontification in their own way, and @kbd{M-x font-lock-mode} has
 173 nothing to do with it.  To control fontification in Info mode, use the
 174 variable @code{Info-fontify}.
 175
 176 @item
 177 The Grep package has been merged with Compilation mode.  Many
 178 grep-specific commands and user options have thus been eliminated.
 179 Also, @kbd{M-x grep} never tries the GNU grep @samp{-H} option,
 180 and instead silently appends @file{/dev/null} to the command line.
 181
 182 @item
 183 In Dired's @kbd{!} command, @samp{*} and @samp{?} now
 184 cause substitution of the file names wherever they appear---not
 185 only when they are surrounded by whitespace.
 186
 187 @item
 188 When a file is managed with version control, the command @kbd{C-x C-q}
 189 (whose general meaning is to make a buffer read-only or writable) now
 190 does so by checking the file in or out.  Checking the file out makes
 191 the buffer writable; checking it in makes the buffer read-only.
 192
 193 You can still use @kbd{C-x v v} to do these operations if you wish;
 194 its meaning is unchanged.  If you want to control the buffer's
 195 read-only flag without performing any version control operation,
 196 use @kbd{M-x toggle-read-only}.
 197
 198 @item
 199 SGML mode does not handle XML syntax, and does not have indentation
 200 support.
 201
 202 @item
 203 Many Info mode commands have been removed.  Incremental search in Info
 204 searches only the current node.
 205
 206 @item
 207 Many @code{etags} features for customizing parsing using regexps
 208 have been removed.
 209
 210 @item
 211 The Emacs server now runs a small C program called @file{emacsserver},
 212 rather than trying to handle everything in Emacs Lisp.  Now there can
 213 only be one Emacs server running at a time.  The @code{server-mode}
 214 command and @code{server-name} user option have been eliminated.
 215
 216 @item
 217 The @file{emacsclient} program no longer accepts the @samp{--eval} and
 218 @samp{--display} command line options.
 219
 220 @item
 221 The command @code{quail-show-key}, for showing how to input a
 222 character, has been removed.
 223
 224 @item
 225 The default value of @code{keyboard-coding-system} is always
 226 @code{nil}, regardless of your locale settings.  If you want some
 227 other value, set it yourself.
 228
 229 @item
 230 Unicode support and unification between Latin-@var{n} character sets
 231 have been removed.  Cutting and pasting X selections does not support
 232 ``extended segments'', so there are certain coding systems it cannot
 233 handle.
 234
 235 @item
 236 The input methods for Emacs are included in a separate distribution
 237 called ``Leim''.  To use this, you must extract the Leim tar file on
 238 top of the Emacs distribution, into the same directory, before you
 239 build Emacs.
 240
 241 @item
 242 The following input methods have been eliminated: belarusian,
 243 bulgarian-bds, bulgarian-phonetic, chinese-sisheng, croatian, dutch,
 244 georgian, latin-alt-postfix, latin-postfix, latin-prefix,
 245 latvian-keyboard, lithuanian-numeric, lithuanian-keyboard,
 246 malayalam-inscript, rfc1345, russian-computer, sgml, slovenian,
 247 tamil-inscript ucs, ukrainian-computer, vietnamese-telex, and welsh.
 248
 249 @item
 250 The following language environments have been eliminated: Belarusian,
 251 Bulgarian, Chinese-EUC-TW, Croatian, French, Georgian, Italian,
 252 Latin-6, Latin-7, Latvian, Lithuanian, Malayalam, Russian, Russian,
 253 Slovenian, Swedish, Tajik, Tamil, UTF-8, Ukrainian, Ukrainian, Welsh,
 254 and Windows-1255.
 255
 256 @item
 257 The @code{code-pages} library, which contained various 8-bit coding
 258 systems, has been removed.
 259
 260 @item
 261 The Kmacro package has been replaced with a simple and elegant
 262 keyboard macro system.  Use @kbd{C-x (} to start a new keyboard macro,
 263 @kbd{C-x )} to end the macro, and @kbd{C-x e} to execute the last
 264 macro.
 265
 266 @item
 267 The Calc, CUA, GDB-UI, Ibuffer, Ido, Password, Printing, Reveal,
 268 Ruler-mode, SES, Table, Tramp, and URL packages have been removed.
 269 The Benchmark, Cfengine, Conf, Dns, Flymake, Python, Thumbs, and
 270 Wdired modes have also been removed.
 271
 272 @item
 273 The Emacs Lisp Reference Manual and the Introduction to Programming in
 274 Emacs Lisp are now distributed separately, not in the Emacs
 275 distribution.
 276
 277 @item
 278 On MS Windows, there is no longer any support for tooltips, images,
 279 sound, different mouse pointer shapes, or pointing devices with more
 280 than 3 buttons.  If you want these features, consider switching to
 281 another operating system.  But even if you don't want these features,
 282 you should still switch---for freedom's sake.
 283
 284 @item
 285 Emacs will not use Unicode for clipboard operations on MS Windows.
 286
 287 @item
 288 To keep up with decreasing computer memory capacity and disk space, many
 289 other functions and files have been eliminated in Emacs 21.4.
 290 @end itemize
 291
 292 @ignore
 293    arch-tag: 32932bd9-46f5-41b2-8a0e-fb0cc4caeb29
 294 @end ignore