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6bf7aab6 | 1 | @c This is part of the Emacs manual. |
4e6835db | 2 | @c Copyright (C) 2005, 2006, 2007 Free Software Foundation, Inc. |
6bf7aab6 DL |
3 | @c See file emacs.texi for copying conditions. |
4 | ||
9e827d47 | 5 | @node Antinews, Mac OS, X Resources, Top |
cb08cc40 | 6 | @appendix Emacs 21 Antinews |
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7 | |
8 | For those users who live backwards in time, here is information about | |
4a3cb252 | 9 | downgrading to Emacs version 21.4. We hope you will enjoy the greater |
cb08cc40 LK |
10 | simplicity that results from the absence of many Emacs @value{EMACSVER} |
11 | features. | |
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12 | |
13 | @itemize @bullet | |
4829cfc3 | 14 | |
6bf7aab6 | 15 | @item |
4829cfc3 RS |
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. | |
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18 | |
19 | @item | |
4829cfc3 | 20 | The mode line of the selected window is no longer displayed with a |
e6cbffd9 RS |
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. | |
6bf7aab6 DL |
25 | |
26 | @item | |
4829cfc3 RS |
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}). | |
6bf7aab6 | 31 | |
4829cfc3 RS |
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. | |
6bf7aab6 | 35 | |
189a47e4 | 36 | @item |
4d927252 LT |
37 | On an xterm, even if you enable Xterm Mouse mode, Emacs provides a |
38 | more convincing simulation of a text terminal by not responding to | |
39 | mouse clicks on the mode line, header line, or display margin. | |
189a47e4 | 40 | |
6bf7aab6 | 41 | @item |
4829cfc3 RS |
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. | |
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45 | |
46 | @item | |
4829cfc3 | 47 | The horizontal-bar cursor shape has been removed. |
6bf7aab6 | 48 | |
6bf7aab6 | 49 | @item |
4829cfc3 RS |
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. | |
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54 | |
55 | @item | |
4829cfc3 RS |
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. | |
daaf40c7 | 59 | |
6bf7aab6 | 60 | @item |
4829cfc3 RS |
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. | |
daaf40c7 | 64 | |
6bf7aab6 | 65 | @item |
27a19a63 CY |
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 | |
b4e79601 JB |
69 | putting @file{.emacs_SHELL} as @file{init_SHELL.sh} in |
70 | @file{~/.emacs.d}; Emacs won't find it. | |
daaf40c7 | 71 | |
6bf7aab6 | 72 | @item |
4829cfc3 RS |
73 | Emacs will not read @file{~/.abbrev_defs} automatically. If you want |
74 | to load abbrev definitions from a file, you must always do so | |
75 | explicitly. | |
76 | ||
77 | @item | |
78 | When you are logged in as root, all files now give you writable | |
79 | buffers, reflecting the fact that you can write any files. | |
daaf40c7 | 80 | |
6bf7aab6 | 81 | @item |
4829cfc3 RS |
82 | The maximum size of buffers and integer variables has been halved. On |
83 | 32-bit machines, the maximum buffer size is now 128 megabytes. | |
daaf40c7 | 84 | |
6bf7aab6 | 85 | @item |
975a44e2 RS |
86 | An unquoted @samp{$} in a file name is now an error, if the following |
87 | name is not recognized as an environment variable. Thus, | |
88 | the file name @file{foo$bar} would probably be an error. Meanwhile, | |
89 | the @code{setenv} command does not expand @samp{$} at all. | |
6bf7aab6 | 90 | |
4829cfc3 | 91 | @item |
4d927252 LT |
92 | If a single command accumulates too much undo information, Emacs never |
93 | discards it. If Emacs runs out of memory as a result, it will handle | |
4829cfc3 RS |
94 | this by crashing. |
95 | ||
96 | @item | |
97 | Many commands have been removed from the menus or rearranged. | |
98 | ||
99 | @item | |
100 | The @kbd{C-h} (help) subcommands have been rearranged---especially | |
101 | those that display specific files. Type @kbd{C-h C-h} to see a list | |
102 | of these commands; that will show you what is different. | |
103 | ||
104 | @item | |
105 | The @kbd{C-h v} and @kbd{C-h f} commands no longer show a hyperlink to | |
106 | the C source code, even if it is available. If you want to find the | |
107 | source code, grep for it. | |
108 | ||
109 | @item | |
110 | The apropos commands will not accept a list of words to match, in | |
dcfd1961 | 111 | order to encourage you to be more specific. Also, the user option |
4829cfc3 RS |
112 | @code{apropos-sort-by-scores} has been removed. |
113 | ||
114 | @item | |
115 | The minibuffer prompt is now displayed using the default face. | |
116 | The colon is enough to show you what part is the prompt. | |
117 | ||
118 | @item | |
119 | Minibuffer completion commands always complete the entire minibuffer | |
120 | contents, just as if you had typed them at the end of the minibuffer, | |
121 | no matter where point is actually located. | |
122 | ||
123 | @item | |
124 | The command @code{backward-kill-sexp} is now bound to @kbd{C-M-delete} | |
125 | and @kbd{C-M-backspace}. Be careful when using these key sequences! | |
126 | It may shut down your X server, or reboot your operating system. | |
127 | ||
daaf40c7 | 128 | @item |
975a44e2 | 129 | Commands to set the mark at a place away from point, including |
88e750a4 | 130 | @kbd{M-@@}, @kbd{M-h}, etc., don't do anything special when you repeat |
975a44e2 | 131 | them. In most cases, typing these commands multiple times is |
4829cfc3 | 132 | equivalent to typing them once. @kbd{M-h} ignores numeric arguments. |
6bf7aab6 | 133 | |
daaf40c7 | 134 | @item |
4d927252 | 135 | The user option @code{set-mark-command-repeat-pop} has been removed. |
6bf7aab6 | 136 | |
daaf40c7 | 137 | @item |
4829cfc3 RS |
138 | @kbd{C-@key{SPC} C-@key{SPC}} has no special meaning--it just sets the |
139 | mark twice. Neither does @kbd{C-u C-x C-x}, which simply exchanges | |
140 | point and mark like @kbd{C-x C-x}. | |
16d51a35 EZ |
141 | |
142 | @item | |
4829cfc3 RS |
143 | The function @code{sentence-end} has been eliminated in favor of a |
144 | more straightforward approach: directly setting the variable | |
145 | @code{sentence-end}. For example, to end each sentence with a single | |
146 | space, use | |
147 | ||
148 | @lisp | |
149 | (setq sentence-end "[.?!][]\"')@}]*\\($\\|[ \t]\\)[ \t\n]*") | |
150 | @end lisp | |
16d51a35 EZ |
151 | |
152 | @item | |
4829cfc3 RS |
153 | The variable @code{fill-nobreak-predicate} is no longer customizable, |
154 | and it can only hold a single function. | |
6bf7aab6 | 155 | |
daaf40c7 | 156 | @item |
90f0b6ba RS |
157 | Nobreak spaces and hyphens are displayed just like normal characters, |
158 | and the user option @code{nobreak-char-display} has been removed. | |
6bf7aab6 DL |
159 | |
160 | @item | |
4829cfc3 RS |
161 | @kbd{C-w} in an incremental search always grabs an entire word |
162 | into the search string. More precisely, it grabs text through | |
163 | the next end of a word. | |
6bf7aab6 DL |
164 | |
165 | @item | |
4829cfc3 RS |
166 | Yanking now preserves all text properties that were in the killed |
167 | text. The variable @code{yank-excluded-properties} has been removed. | |
6bf7aab6 DL |
168 | |
169 | @item | |
4829cfc3 RS |
170 | Occur mode, Info mode, and Comint-derived modes now control |
171 | fontification in their own way, and @kbd{M-x font-lock-mode} has | |
172 | nothing to do with it. To control fontification in Info mode, use the | |
173 | variable @code{Info-fontify}. | |
6bf7aab6 | 174 | |
fa23e705 RS |
175 | @item |
176 | @samp{M-x shell} is now completely standard in regard to scrolling | |
177 | behavior. It no longer has the option of scrolling the input line to | |
178 | the bottom of the window the way a text terminal running a shell does. | |
179 | ||
6bf7aab6 | 180 | @item |
4829cfc3 RS |
181 | The Grep package has been merged with Compilation mode. Many |
182 | grep-specific commands and user options have thus been eliminated. | |
183 | Also, @kbd{M-x grep} never tries the GNU grep @samp{-H} option, | |
184 | and instead silently appends @file{/dev/null} to the command line. | |
6bf7aab6 DL |
185 | |
186 | @item | |
4829cfc3 RS |
187 | In Dired's @kbd{!} command, @samp{*} and @samp{?} now |
188 | cause substitution of the file names wherever they appear---not | |
189 | only when they are surrounded by whitespace. | |
190 | ||
191 | @item | |
192 | When a file is managed with version control, the command @kbd{C-x C-q} | |
193 | (whose general meaning is to make a buffer read-only or writable) now | |
194 | does so by checking the file in or out. Checking the file out makes | |
195 | the buffer writable; checking it in makes the buffer read-only. | |
196 | ||
197 | You can still use @kbd{C-x v v} to do these operations if you wish; | |
198 | its meaning is unchanged. If you want to control the buffer's | |
199 | read-only flag without performing any version control operation, | |
200 | use @kbd{M-x toggle-read-only}. | |
201 | ||
202 | @item | |
203 | SGML mode does not handle XML syntax, and does not have indentation | |
204 | support. | |
205 | ||
206 | @item | |
207 | Many Info mode commands have been removed. Incremental search in Info | |
208 | searches only the current node. | |
6bf7aab6 DL |
209 | |
210 | @item | |
975a44e2 RS |
211 | Many @code{etags} features for customizing parsing using regexps |
212 | have been removed. | |
6bf7aab6 | 213 | |
0772f3a3 | 214 | @item |
4829cfc3 RS |
215 | The Emacs server now runs a small C program called @file{emacsserver}, |
216 | rather than trying to handle everything in Emacs Lisp. Now there can | |
217 | only be one Emacs server running at a time. The @code{server-mode} | |
218 | command and @code{server-name} user option have been eliminated. | |
219 | ||
220 | @item | |
032a41d4 JB |
221 | The @file{emacsclient} program no longer accepts the @samp{--eval}, |
222 | @samp{--display} and @samp{--server-file} command line options, and | |
223 | can only establish local connections using Unix domain sockets. | |
4829cfc3 RS |
224 | |
225 | @item | |
226 | The command @code{quail-show-key}, for showing how to input a | |
227 | character, has been removed. | |
228 | ||
229 | @item | |
230 | The default value of @code{keyboard-coding-system} is always | |
231 | @code{nil}, regardless of your locale settings. If you want some | |
232 | other value, set it yourself. | |
233 | ||
234 | @item | |
235 | Unicode support and unification between Latin-@var{n} character sets | |
236 | have been removed. Cutting and pasting X selections does not support | |
237 | ``extended segments'', so there are certain coding systems it cannot | |
238 | handle. | |
239 | ||
240 | @item | |
241 | The input methods for Emacs are included in a separate distribution | |
99cf5b74 | 242 | called ``Leim.'' To use this, you must extract the Leim tar file on |
4829cfc3 RS |
243 | top of the Emacs distribution, into the same directory, before you |
244 | build Emacs. | |
245 | ||
246 | @item | |
247 | The following input methods have been eliminated: belarusian, | |
248 | bulgarian-bds, bulgarian-phonetic, chinese-sisheng, croatian, dutch, | |
249 | georgian, latin-alt-postfix, latin-postfix, latin-prefix, | |
250 | latvian-keyboard, lithuanian-numeric, lithuanian-keyboard, | |
251 | malayalam-inscript, rfc1345, russian-computer, sgml, slovenian, | |
252 | tamil-inscript ucs, ukrainian-computer, vietnamese-telex, and welsh. | |
253 | ||
254 | @item | |
255 | The following language environments have been eliminated: Belarusian, | |
256 | Bulgarian, Chinese-EUC-TW, Croatian, French, Georgian, Italian, | |
257 | Latin-6, Latin-7, Latvian, Lithuanian, Malayalam, Russian, Russian, | |
258 | Slovenian, Swedish, Tajik, Tamil, UTF-8, Ukrainian, Ukrainian, Welsh, | |
259 | and Windows-1255. | |
260 | ||
261 | @item | |
262 | The @code{code-pages} library, which contained various 8-bit coding | |
263 | systems, has been removed. | |
264 | ||
265 | @item | |
266 | The Kmacro package has been replaced with a simple and elegant | |
267 | keyboard macro system. Use @kbd{C-x (} to start a new keyboard macro, | |
268 | @kbd{C-x )} to end the macro, and @kbd{C-x e} to execute the last | |
4d927252 LT |
269 | macro. Use @kbd{M-x name-last-kbd-macro} to name the most recently |
270 | defined macro. | |
4829cfc3 RS |
271 | |
272 | @item | |
6d10dc37 NR |
273 | Emacs no longer displays your breakpoints in the source buffer, so you |
274 | have to remember where you left them. It can be difficult to inspect | |
85f92a48 | 275 | the state of your debugged program from the command line, so Emacs |
6d10dc37 NR |
276 | tries to demonstrate this in the GUD buffer. |
277 | ||
278 | @item | |
279 | The Calc, CUA, Ibuffer, Ido, Password, Printing, Reveal, | |
4829cfc3 RS |
280 | Ruler-mode, SES, Table, Tramp, and URL packages have been removed. |
281 | The Benchmark, Cfengine, Conf, Dns, Flymake, Python, Thumbs, and | |
282 | Wdired modes have also been removed. | |
283 | ||
284 | @item | |
285 | The Emacs Lisp Reference Manual and the Introduction to Programming in | |
286 | Emacs Lisp are now distributed separately, not in the Emacs | |
287 | distribution. | |
288 | ||
289 | @item | |
290 | On MS Windows, there is no longer any support for tooltips, images, | |
291 | sound, different mouse pointer shapes, or pointing devices with more | |
292 | than 3 buttons. If you want these features, consider switching to | |
293 | another operating system. But even if you don't want these features, | |
294 | you should still switch---for freedom's sake. | |
0772f3a3 | 295 | |
6bf7aab6 | 296 | @item |
4829cfc3 | 297 | Emacs will not use Unicode for clipboard operations on MS Windows. |
6bf7aab6 DL |
298 | |
299 | @item | |
daaf40c7 | 300 | To keep up with decreasing computer memory capacity and disk space, many |
4a3cb252 | 301 | other functions and files have been eliminated in Emacs 21.4. |
6bf7aab6 | 302 | @end itemize |
ab5796a9 MB |
303 | |
304 | @ignore | |
305 | arch-tag: 32932bd9-46f5-41b2-8a0e-fb0cc4caeb29 | |
306 | @end ignore |