Commit | Line | Data |
---|---|---|
802b0ea7 | 1 | @c This is part of the Emacs manual. |
dddbaa16 | 2 | @c Copyright (C) 1985, 86, 87, 93, 94, 95, 1997, 2000 Free Software Foundation, Inc. |
6bf7aab6 DL |
3 | @c See file emacs.texi for copying conditions. |
4 | @node Display, Search, Registers, Top | |
5 | @chapter Controlling the Display | |
6 | ||
7 | Since only part of a large buffer fits in the window, Emacs tries to | |
8 | show a part that is likely to be interesting. Display-control commands | |
9 | allow you to specify which part of the text you want to see, and how to | |
10 | display it. | |
11 | ||
12 | @menu | |
13 | * Scrolling:: Moving text up and down in a window. | |
14 | * Horizontal Scrolling:: Moving text left and right in a window. | |
15 | * Follow Mode:: Follow mode lets two windows scroll as one. | |
16 | * Selective Display:: Hiding lines with lots of indentation. | |
17 | * Optional Mode Line:: Optional mode line display features. | |
18 | * Text Display:: How text characters are normally displayed. | |
e598186c | 19 | * Display Custom:: Information on variables for customizing display. |
099bfef9 | 20 | * Cursor Display:: Features for displaying the cursor. |
6bf7aab6 DL |
21 | @end menu |
22 | ||
23 | @node Scrolling | |
24 | @section Scrolling | |
25 | ||
26 | If a buffer contains text that is too large to fit entirely within a | |
27 | window that is displaying the buffer, Emacs shows a contiguous portion of | |
28 | the text. The portion shown always contains point. | |
29 | ||
30 | @cindex scrolling | |
31 | @dfn{Scrolling} means moving text up or down in the window so that | |
32 | different parts of the text are visible. Scrolling forward means that text | |
33 | moves up, and new text appears at the bottom. Scrolling backward moves | |
34 | text down and new text appears at the top. | |
35 | ||
36 | Scrolling happens automatically if you move point past the bottom or top | |
37 | of the window. You can also explicitly request scrolling with the commands | |
38 | in this section. | |
39 | ||
40 | @table @kbd | |
41 | @item C-l | |
42 | Clear screen and redisplay, scrolling the selected window to center | |
43 | point vertically within it (@code{recenter}). | |
44 | @item C-v | |
45 | Scroll forward (a windowful or a specified number of lines) (@code{scroll-up}). | |
46 | @item @key{NEXT} | |
47 | Likewise, scroll forward. | |
48 | @item M-v | |
49 | Scroll backward (@code{scroll-down}). | |
50 | @item @key{PRIOR} | |
51 | Likewise, scroll backward. | |
52 | @item @var{arg} C-l | |
53 | Scroll so point is on line @var{arg} (@code{recenter}). | |
54 | @item C-M-l | |
55 | Scroll heuristically to bring useful information onto the screen | |
56 | (@code{reposition-window}). | |
57 | @end table | |
58 | ||
59 | @kindex C-l | |
60 | @findex recenter | |
61 | The most basic scrolling command is @kbd{C-l} (@code{recenter}) with | |
62 | no argument. It clears the entire screen and redisplays all windows. | |
63 | In addition, it scrolls the selected window so that point is halfway | |
64 | down from the top of the window. | |
65 | ||
66 | @kindex C-v | |
67 | @kindex M-v | |
68 | @kindex NEXT | |
69 | @kindex PRIOR | |
70 | @findex scroll-up | |
71 | @findex scroll-down | |
72 | The scrolling commands @kbd{C-v} and @kbd{M-v} let you move all the text | |
73 | in the window up or down a few lines. @kbd{C-v} (@code{scroll-up}) with an | |
74 | argument shows you that many more lines at the bottom of the window, moving | |
75 | the text and point up together as @kbd{C-l} might. @kbd{C-v} with a | |
76 | negative argument shows you more lines at the top of the window. | |
77 | @kbd{M-v} (@code{scroll-down}) is like @kbd{C-v}, but moves in the | |
78 | opposite direction. The function keys @key{NEXT} and @key{PRIOR} are | |
79 | equivalent to @kbd{C-v} and @kbd{M-v}. | |
80 | ||
81 | The names of scroll commands are based on the direction that the text | |
82 | moves in the window. Thus, the command to scroll forward is called | |
83 | @code{scroll-up} because it moves the text upward on the screen. | |
84 | ||
85 | @vindex next-screen-context-lines | |
86 | To read the buffer a windowful at a time, use @kbd{C-v} with no argument. | |
87 | It takes the last two lines at the bottom of the window and puts them at | |
88 | the top, followed by nearly a whole windowful of lines not previously | |
89 | visible. If point was in the text scrolled off the top, it moves to the | |
90 | new top of the window. @kbd{M-v} with no argument moves backward with | |
91 | overlap similarly. The number of lines of overlap across a @kbd{C-v} or | |
92 | @kbd{M-v} is controlled by the variable @code{next-screen-context-lines}; by | |
93 | default, it is 2. | |
94 | ||
95 | @vindex scroll-preserve-screen-position | |
96 | Some users like the full-screen scroll commands to keep point at the | |
97 | same screen line. To enable this behavior, set the variable | |
98 | @code{scroll-preserve-screen-position} to a non-@code{nil} value. This | |
99 | mode is convenient for browsing through a file by scrolling by | |
100 | screenfuls; if you come back to the screen where you started, point goes | |
101 | back to the line where it started. However, this mode is inconvenient | |
102 | when you move to the next screen in order to move point to the text | |
103 | there. | |
104 | ||
105 | Another way to do scrolling is with @kbd{C-l} with a numeric argument. | |
106 | @kbd{C-l} does not clear the screen when given an argument; it only scrolls | |
107 | the selected window. With a positive argument @var{n}, it repositions text | |
108 | to put point @var{n} lines down from the top. An argument of zero puts | |
109 | point on the very top line. Point does not move with respect to the text; | |
110 | rather, the text and point move rigidly on the screen. @kbd{C-l} with a | |
111 | negative argument puts point that many lines from the bottom of the window. | |
112 | For example, @kbd{C-u - 1 C-l} puts point on the bottom line, and @kbd{C-u | |
113 | - 5 C-l} puts it five lines from the bottom. Just @kbd{C-u} as argument, | |
114 | as in @kbd{C-u C-l}, scrolls point to the center of the selected window. | |
115 | ||
116 | @kindex C-M-l | |
117 | @findex reposition-window | |
118 | The @kbd{C-M-l} command (@code{reposition-window}) scrolls the current | |
119 | window heuristically in a way designed to get useful information onto | |
120 | the screen. For example, in a Lisp file, this command tries to get the | |
121 | entire current defun onto the screen if possible. | |
122 | ||
123 | @vindex scroll-conservatively | |
124 | Scrolling happens automatically if point has moved out of the visible | |
125 | portion of the text when it is time to display. Normally, automatic | |
126 | scrolling centers point vertically within the window. However, if you | |
127 | set @code{scroll-conservatively} to a small number @var{n}, then if you | |
128 | move point just a little off the screen---less than @var{n} lines---then | |
129 | Emacs scrolls the text just far enough to bring point back on screen. | |
130 | By default, @code{scroll-conservatively} is 0. | |
131 | ||
6dd5e8cc EZ |
132 | @cindex aggressive scrolling |
133 | @vindex scroll-up-aggressively | |
134 | @vindex scroll-down-aggressively | |
e598186c RS |
135 | When the window does scroll by a longer distance, you can control |
136 | how aggressively it scrolls, by setting the variables | |
137 | @code{scroll-up-aggressively} and @code{scroll-down-aggressively}. | |
138 | The value of @code{scroll-up-aggressively} should be either | |
139 | @code{nil}, or a fraction @var{f} between 0 and 1. A fraction | |
140 | specifies where on the screen to put point when scrolling upward. | |
141 | More precisely, when a window scrolls up because point is above the | |
142 | window start, the new start position is chosen to put point @var{f} | |
143 | part of the window height from the top. The larger @var{f}, the more | |
144 | aggressive the scrolling. | |
145 | ||
146 | @code{nil}, which is the default, scrolls to put point at the center. | |
147 | So it is equivalent to .5. | |
148 | ||
149 | Likewise, @code{scroll-down-aggressively} is used for scrolling | |
150 | down. The value, @var{f}, specifies how far point should be placed | |
151 | from the bottom of the window; thus, as with | |
152 | @code{scroll-up-aggressively}, a larger value is more aggressive. | |
6dd5e8cc | 153 | |
6bf7aab6 DL |
154 | @vindex scroll-margin |
155 | The variable @code{scroll-margin} restricts how close point can come | |
156 | to the top or bottom of a window. Its value is a number of screen | |
157 | lines; if point comes within that many lines of the top or bottom of the | |
158 | window, Emacs recenters the window. By default, @code{scroll-margin} is | |
159 | 0. | |
160 | ||
161 | @node Horizontal Scrolling | |
162 | @section Horizontal Scrolling | |
163 | @cindex horizontal scrolling | |
164 | ||
165 | @dfn{Horizontal scrolling} means shifting all the lines sideways | |
e598186c RS |
166 | within a window---so that some of the text near the left margin is not |
167 | displayed at all. Emacs does this automatically, in any window that | |
168 | uses line truncation rather than continuation: whenever point moves | |
169 | off the left or right edge of the screen, Emacs scrolls the buffer | |
170 | horizontally to make point visible. | |
171 | ||
172 | When a window has been scrolled horizontally, text lines are truncated | |
173 | rather than continued (@pxref{Continuation Lines}), with a @samp{$} | |
174 | appearing in the first column when there is text truncated to the left, | |
175 | and in the last column when there is text truncated to the right. | |
176 | ||
177 | You can use these commands to do explicit horizontal scrolling. | |
6bf7aab6 DL |
178 | |
179 | @table @kbd | |
180 | @item C-x < | |
181 | Scroll text in current window to the left (@code{scroll-left}). | |
182 | @item C-x > | |
183 | Scroll to the right (@code{scroll-right}). | |
184 | @end table | |
185 | ||
6bf7aab6 DL |
186 | @kindex C-x < |
187 | @kindex C-x > | |
188 | @findex scroll-left | |
189 | @findex scroll-right | |
190 | The command @kbd{C-x <} (@code{scroll-left}) scrolls the selected | |
191 | window to the left by @var{n} columns with argument @var{n}. This moves | |
192 | part of the beginning of each line off the left edge of the window. | |
193 | With no argument, it scrolls by almost the full width of the window (two | |
194 | columns less, to be precise). | |
195 | ||
196 | @kbd{C-x >} (@code{scroll-right}) scrolls similarly to the right. The | |
197 | window cannot be scrolled any farther to the right once it is displayed | |
198 | normally (with each line starting at the window's left margin); | |
199 | attempting to do so has no effect. This means that you don't have to | |
200 | calculate the argument precisely for @w{@kbd{C-x >}}; any sufficiently large | |
201 | argument will restore the normal display. | |
202 | ||
e598186c RS |
203 | If you scroll a window horizontally by hand, that sets a lower bound |
204 | for automatic horizontal scrolling. Automatic scrolling will continue | |
205 | to scroll the window, but never further to the right than the amount | |
206 | you previously set by @code{scroll-left}. | |
6bf7aab6 | 207 | |
e598186c RS |
208 | @vindex automatic-hscrolling |
209 | To disable automatic horizontal scrolling, set the variable | |
210 | @code{automatic-hscrolling} to @code{nil}. | |
03ff8aab | 211 | |
6bf7aab6 DL |
212 | @node Follow Mode |
213 | @section Follow Mode | |
214 | @cindex Follow mode | |
215 | @cindex mode, Follow | |
fd3d3075 RS |
216 | @findex follow-mode |
217 | @cindex windows, synchronizing | |
218 | @cindex synchronizing windows | |
6bf7aab6 DL |
219 | |
220 | @dfn{Follow mode} is a minor mode that makes two windows showing the | |
221 | same buffer scroll as one tall ``virtual window.'' To use Follow mode, | |
222 | go to a frame with just one window, split it into two side-by-side | |
223 | windows using @kbd{C-x 3}, and then type @kbd{M-x follow-mode}. From | |
224 | then on, you can edit the buffer in either of the two windows, or scroll | |
225 | either one; the other window follows it. | |
226 | ||
8f399c9b RS |
227 | In Follow mode, if you move point outside the portion visible in one |
228 | window and into the portion visible in the other window, that selects | |
229 | the other window---again, treating the two as if they were parts of | |
230 | one large window. | |
231 | ||
6bf7aab6 DL |
232 | To turn off Follow mode, type @kbd{M-x follow-mode} a second time. |
233 | ||
234 | @node Selective Display | |
235 | @section Selective Display | |
4946337d | 236 | @cindex selective display |
6bf7aab6 DL |
237 | @findex set-selective-display |
238 | @kindex C-x $ | |
239 | ||
240 | Emacs has the ability to hide lines indented more than a certain number | |
241 | of columns (you specify how many columns). You can use this to get an | |
242 | overview of a part of a program. | |
243 | ||
244 | To hide lines, type @kbd{C-x $} (@code{set-selective-display}) with a | |
245 | numeric argument @var{n}. Then lines with at least @var{n} columns of | |
246 | indentation disappear from the screen. The only indication of their | |
247 | presence is that three dots (@samp{@dots{}}) appear at the end of each | |
248 | visible line that is followed by one or more hidden ones. | |
249 | ||
250 | The commands @kbd{C-n} and @kbd{C-p} move across the hidden lines as | |
251 | if they were not there. | |
252 | ||
253 | The hidden lines are still present in the buffer, and most editing | |
254 | commands see them as usual, so you may find point in the middle of the | |
255 | hidden text. When this happens, the cursor appears at the end of the | |
256 | previous line, after the three dots. If point is at the end of the | |
257 | visible line, before the newline that ends it, the cursor appears before | |
258 | the three dots. | |
259 | ||
260 | To make all lines visible again, type @kbd{C-x $} with no argument. | |
261 | ||
262 | @vindex selective-display-ellipses | |
263 | If you set the variable @code{selective-display-ellipses} to | |
264 | @code{nil}, the three dots do not appear at the end of a line that | |
265 | precedes hidden lines. Then there is no visible indication of the | |
266 | hidden lines. This variable becomes local automatically when set. | |
267 | ||
268 | @node Optional Mode Line | |
269 | @section Optional Mode Line Features | |
270 | ||
e598186c RS |
271 | @cindex line number display |
272 | @cindex display of line number | |
6bf7aab6 DL |
273 | @findex line-number-mode |
274 | The current line number of point appears in the mode line when Line | |
275 | Number mode is enabled. Use the command @kbd{M-x line-number-mode} to | |
276 | turn this mode on and off; normally it is on. The line number appears | |
277 | before the buffer percentage @var{pos}, with the letter @samp{L} to | |
278 | indicate what it is. @xref{Minor Modes}, for more information about | |
279 | minor modes and about how to use this command. | |
280 | ||
281 | @vindex line-number-display-limit | |
282 | If the buffer is very large (larger than the value of | |
283 | @code{line-number-display-limit}), then the line number doesn't appear. | |
284 | Emacs doesn't compute the line number when the buffer is large, because | |
14977fea DL |
285 | that would be too slow. Set it to @code{nil} to remove the limit. If |
286 | you have narrowed the buffer (@pxref{Narrowing}), the displayed line | |
287 | number is relative to the accessible portion of the buffer. | |
6bf7aab6 DL |
288 | |
289 | @cindex Column Number mode | |
290 | @cindex mode, Column Number | |
291 | @findex column-number-mode | |
292 | You can also display the current column number by turning on Column | |
293 | Number mode. It displays the current column number preceded by the | |
294 | letter @samp{C}. Type @kbd{M-x column-number-mode} to toggle this mode. | |
295 | ||
296 | @findex display-time | |
297 | @cindex time (on mode line) | |
298 | Emacs can optionally display the time and system load in all mode | |
4f00b8c1 DL |
299 | lines. To enable this feature, type @kbd{M-x display-time} or customize |
300 | the option @code{display-time-mode}. The information added to the mode | |
301 | line usually appears after the buffer name, before the mode names and | |
302 | their parentheses. It looks like this: | |
6bf7aab6 DL |
303 | |
304 | @example | |
305 | @var{hh}:@var{mm}pm @var{l.ll} | |
306 | @end example | |
307 | ||
308 | @noindent | |
309 | @vindex display-time-24hr-format | |
310 | Here @var{hh} and @var{mm} are the hour and minute, followed always by | |
311 | @samp{am} or @samp{pm}. @var{l.ll} is the average number of running | |
312 | processes in the whole system recently. (Some fields may be missing if | |
313 | your operating system cannot support them.) If you prefer time display | |
314 | in 24-hour format, set the variable @code{display-time-24hr-format} | |
315 | to @code{t}. | |
316 | ||
317 | @cindex mail (on mode line) | |
72bd7b7b DL |
318 | @vindex display-time-use-mail-icon |
319 | @vindex display-time-mail-face | |
6bf7aab6 | 320 | The word @samp{Mail} appears after the load level if there is mail |
72bd7b7b DL |
321 | for you that you have not read yet. On a graphical display you can use |
322 | an icon instead of @samp{Mail} by customizing | |
323 | @code{display-time-use-mail-icon}; this may save some space on the mode | |
324 | line. You can customize @code{display-time-mail-face} to make the mail | |
325 | indicator prominent. | |
6bf7aab6 | 326 | |
bd3ead08 EZ |
327 | @cindex mode line, 3D appearence |
328 | @cindex attributes of mode line, changing | |
329 | @cindex non-integral number of lines in a window | |
330 | By default, the mode line is drawn on graphics displays as a 3D | |
331 | released button. Depending on the font used for the mode line's text, | |
332 | this might make the mode line use more space than a text line in a | |
333 | window, and cause the last line of the window be partially obscured. | |
334 | That is, the window displays a non-integral number of text lines. If | |
335 | you don't like this effect, you can disable the 3D appearence of the | |
336 | mode line by customizing the attributes of the @code{mode-line} face in | |
337 | your @file{.emacs} init file, like this: | |
338 | ||
339 | @example | |
340 | (set-face-attribute 'mode-line nil :box nil) | |
341 | @end example | |
342 | ||
343 | @noindent | |
344 | Alternatively, you could turn off the box attribute in your | |
345 | @file{.Xdefaults} file: | |
346 | ||
347 | @example | |
348 | Emacs.mode-line.AttributeBox: off | |
349 | @end example | |
350 | ||
6bf7aab6 DL |
351 | @node Text Display |
352 | @section How Text Is Displayed | |
353 | @cindex characters (in text) | |
354 | ||
355 | ASCII printing characters (octal codes 040 through 0176) in Emacs | |
356 | buffers are displayed with their graphics. So are non-ASCII multibyte | |
357 | printing characters (octal codes above 0400). | |
358 | ||
359 | Some ASCII control characters are displayed in special ways. The | |
360 | newline character (octal code 012) is displayed by starting a new line. | |
361 | The tab character (octal code 011) is displayed by moving to the next | |
362 | tab stop column (normally every 8 columns). | |
363 | ||
364 | Other ASCII control characters are normally displayed as a caret | |
365 | (@samp{^}) followed by the non-control version of the character; thus, | |
366 | control-A is displayed as @samp{^A}. | |
367 | ||
7c9960d7 DL |
368 | Non-ASCII characters 0200 through 0237 (octal) are displayed with |
369 | octal escape sequences; thus, character code 0230 (octal) is displayed | |
370 | as @samp{\230}. The display of character codes 0240 through 0377 | |
371 | (octal) may be either as escape sequences or as graphics. They do not | |
372 | normally occur in multibyte buffers but if they do, they are displayed | |
373 | as Latin-1 graphics. In unibyte mode, if you enable European display | |
374 | they are displayed using their graphics (assuming your terminal supports | |
375 | them), otherwise as escape sequences. @xref{Single-Byte Character | |
376 | Support}. | |
6bf7aab6 | 377 | |
e598186c RS |
378 | @node Display Custom |
379 | @section Customization of Display | |
6bf7aab6 DL |
380 | |
381 | This section contains information for customization only. Beginning | |
382 | users should skip it. | |
383 | ||
384 | @vindex mode-line-inverse-video | |
dddbaa16 MB |
385 | The variable @code{mode-line-inverse-video} is an obsolete way of |
386 | controlling whether the mode line is displayed in inverse video; the | |
387 | preferred way of doing this is to change the @code{mode-line} face. | |
388 | @xref{Mode Line}. If you specify the foreground color for the | |
389 | @code{mode-line} face, and @code{mode-line-inverse-video} is | |
390 | non-@code{nil}, then the default background color for that face is the | |
391 | usual foreground color. @xref{Faces}. | |
6bf7aab6 DL |
392 | |
393 | @vindex inverse-video | |
394 | If the variable @code{inverse-video} is non-@code{nil}, Emacs attempts | |
395 | to invert all the lines of the display from what they normally are. | |
396 | ||
397 | @vindex visible-bell | |
398 | If the variable @code{visible-bell} is non-@code{nil}, Emacs attempts | |
399 | to make the whole screen blink when it would normally make an audible bell | |
400 | sound. This variable has no effect if your terminal does not have a way | |
401 | to make the screen blink.@refill | |
402 | ||
403 | @vindex no-redraw-on-reenter | |
404 | When you reenter Emacs after suspending, Emacs normally clears the | |
405 | screen and redraws the entire display. On some terminals with more than | |
406 | one page of memory, it is possible to arrange the termcap entry so that | |
407 | the @samp{ti} and @samp{te} strings (output to the terminal when Emacs | |
408 | is entered and exited, respectively) switch between pages of memory so | |
409 | as to use one page for Emacs and another page for other output. Then | |
410 | you might want to set the variable @code{no-redraw-on-reenter} | |
411 | non-@code{nil}; this tells Emacs to assume, when resumed, that the | |
412 | screen page it is using still contains what Emacs last wrote there. | |
413 | ||
414 | @vindex echo-keystrokes | |
415 | The variable @code{echo-keystrokes} controls the echoing of multi-character | |
416 | keys; its value is the number of seconds of pause required to cause echoing | |
417 | to start, or zero meaning don't echo at all. @xref{Echo Area}. | |
418 | ||
419 | @vindex ctl-arrow | |
420 | If the variable @code{ctl-arrow} is @code{nil}, control characters in | |
421 | the buffer are displayed with octal escape sequences, except for newline | |
422 | and tab. Altering the value of @code{ctl-arrow} makes it local to the | |
423 | current buffer; until that time, the default value is in effect. The | |
424 | default is initially @code{t}. @xref{Display Tables,, Display Tables, | |
425 | elisp, The Emacs Lisp Reference Manual}. | |
426 | ||
427 | @vindex tab-width | |
428 | Normally, a tab character in the buffer is displayed as whitespace which | |
429 | extends to the next display tab stop position, and display tab stops come | |
430 | at intervals equal to eight spaces. The number of spaces per tab is | |
431 | controlled by the variable @code{tab-width}, which is made local by | |
432 | changing it, just like @code{ctl-arrow}. Note that how the tab character | |
433 | in the buffer is displayed has nothing to do with the definition of | |
434 | @key{TAB} as a command. The variable @code{tab-width} must have an | |
435 | integer value between 1 and 1000, inclusive. | |
436 | ||
437 | @c @vindex truncate-lines @c No index entry here, because we have one | |
438 | @c in the continuation section. | |
439 | If the variable @code{truncate-lines} is non-@code{nil}, then each | |
440 | line of text gets just one screen line for display; if the text line is | |
441 | too long, display shows only the part that fits. If | |
442 | @code{truncate-lines} is @code{nil}, then long text lines display as | |
443 | more than one screen line, enough to show the whole text of the line. | |
444 | @xref{Continuation Lines}. Altering the value of @code{truncate-lines} | |
445 | makes it local to the current buffer; until that time, the default value | |
446 | is in effect. The default is initially @code{nil}. | |
447 | ||
448 | @c @vindex truncate-partial-width-windows @c Idx entry is in Split Windows. | |
449 | If the variable @code{truncate-partial-width-windows} is | |
450 | non-@code{nil}, it forces truncation rather than continuation in any | |
451 | window less than the full width of the screen or frame, regardless of | |
452 | the value of @code{truncate-lines}. For information about side-by-side | |
453 | windows, see @ref{Split Window}. See also @ref{Display,, Display, | |
454 | elisp, The Emacs Lisp Reference Manual}. | |
455 | ||
456 | @vindex baud-rate | |
87c8b5fd RS |
457 | The variable @code{baud-rate} holds the output speed of the |
458 | terminal, as far as Emacs knows. Setting this variable does not | |
459 | change the speed of actual data transmission, but the value is used | |
460 | for calculations. On terminals, it affects padding, and decisions | |
461 | about whether to scroll part of the screen or redraw it instead. | |
860dab78 | 462 | |
e598186c RS |
463 | On window-systems, @code{baud-rate} is only used to determine how |
464 | frequently to look for pending input during display updating. A | |
465 | higher value of @code{baud-rate} means that check for pending input | |
466 | will be done less frequently. | |
6bf7aab6 DL |
467 | |
468 | You can customize the way any particular character code is displayed | |
469 | by means of a display table. @xref{Display Tables,, Display Tables, | |
470 | elisp, The Emacs Lisp Reference Manual}. | |
e598186c | 471 | |
62095f01 GM |
472 | @cindex hourglass pointer display |
473 | @vindex hourglass-delay | |
099bfef9 RS |
474 | On a window system, Emacs can optionally display the mouse pointer |
475 | in a special shape to say that Emacs is busy. To turn this feature on | |
476 | or off, customize the group @code{cursor}. You can also control the | |
477 | amount of time Emacs must remain busy before the busy indicator is | |
62095f01 | 478 | displayed, by setting the variable @code{hourglass-delay}. |
099bfef9 RS |
479 | |
480 | @node Cursor Display | |
481 | @section Displaying the Cursor | |
482 | ||
e598186c RS |
483 | @findex hl-line-mode |
484 | @findex blink-cursor-mode | |
485 | @cindex cursor, locating visually | |
486 | @cindex cursor, blinking | |
487 | There are a number of ways to customize the display of the cursor. | |
488 | @kbd{M-x hl-line-mode} enables or disables a global minor mode which | |
099bfef9 | 489 | highlights the line containing point. On window systems, the command |
e598186c RS |
490 | @kbd{M-x blink-cursor-mode} turns on or off the blinking of the |
491 | cursor. (On terminals, the terminal itself blinks the cursor, and | |
87c8b5fd | 492 | Emacs has no control over it.) |
e598186c RS |
493 | |
494 | You can customize the cursor's color, and whether it blinks, using | |
495 | the @code{cursor} Custom group (@pxref{Easy Customization}). | |
099bfef9 RS |
496 | |
497 | @vindex x-stretch-cursor | |
498 | @cindex wide block cursor | |
499 | When displaying on a window system, Emacs can optionally draw the | |
500 | block cursor as wide as the character under the cursor---for example, | |
501 | if the cursor is on a tab character, it would cover the full width | |
502 | occupied by that tab character. To enable this feature, set the | |
503 | variable @code{x-stretch-cursor} to a non-@code{nil} value. | |
0f613b80 RS |
504 | |
505 | @cindex cursor in non-selected windows | |
4946337d | 506 | @vindex show-cursor-in-non-selected-windows |
0f613b80 | 507 | @vindex cursor-in-non-selected-windows |
4946337d EZ |
508 | Normally, the cursor in non-selected windows is shown as a hollow box. |
509 | To turn off cursor display in non-selected windows, customize the option | |
510 | @code{show-cursor-in-non-selected-windows}, or set the variable | |
511 | @code{cursor-in-non-selected-windows} to @code{nil}. |