@c This is part of the Emacs manual.
-@c Copyright (C) 1985, 86, 87, 93, 94, 95, 1997, 2000, 2001
+@c Copyright (C) 1985, 86, 87, 93, 94, 95, 1997, 2000, 2001, 2002
@c Free Software Foundation, Inc.
@c See file emacs.texi for copying conditions.
@node Display, Search, Registers, Top
* Font Lock:: Minor mode for syntactic highlighting using faces.
* Highlight Changes:: Using colors to show where you changed the buffer.
* Highlight Interactively:: Tell Emacs what text to highlight.
-* Trailing Whitespace:: Showing possibly-spurious trailing whitespace.
* Scrolling:: Moving text up and down in a window.
* Horizontal Scrolling:: Moving text left and right in a window.
+* Fringes:: Enabling or disabling window fringes.
+* Useless Whitespace:: Showing possibly-spurious trailing whitespace.
* Follow Mode:: Follow mode lets two windows scroll as one.
* Selective Display:: Hiding lines with lots of indentation.
* Optional Mode Line:: Optional mode line display features.
@section Using Multiple Typefaces
@cindex faces
- When using Emacs with a window system, you can set up multiple
-styles of displaying characters. Each style is called a @dfn{face}.
-Each face can specify various attributes, such as the height, weight
-and slant of the characters, the foreground and background color, and
-underlining. But it does not have to specify all of them.
+ Emacs supports using multiple styles of displaying characters. Each
+style is called a @dfn{face}. Each face can specify various @dfn{face
+attributes}, such as the font family, the height, weight and slant of
+the characters, the foreground and background color, and underlining
+or overlining. A face does not have to specify all of these
+attributes; often it inherits many of them from another face.
+
+ On a window system, all the Emacs face attributes are meaningful.
+On a character terminal, only some of them work. Some character
+terminals support inverse video, bold, and underline attributes; some
+support colors. Character terminals generally do not support changing
+the height and width or the font family.
Features which rely on text in multiple faces (such as Font Lock mode)
will also work on non-windowed terminals that can display more than one
specifying the face or faces to use for it. The style of display used
for any given character is determined by combining the attributes of
all the applicable faces specified for that character. Any attribute
-that isn't specified by these faces is taken from the default face,
-which embodies the default settings of the frame itself.
+that isn't specified by these faces is taken from the @code{default} face,
+whose attributes reflect the default settings of the frame itself.
Enriched mode, the mode for editing formatted text, includes several
commands and menus for specifying faces for text in the buffer.
@findex set-face-background
To alter the appearance of a face, use the customization buffer.
@xref{Face Customization}. You can also use X resources to specify
-attributes of particular faces (@pxref{Resources X}). Alternatively,
+attributes of particular faces (@pxref{Resources}). Alternatively,
you can change the foreground and background colors of a specific face
with @kbd{M-x set-face-foreground} and @kbd{M-x set-face-background}.
These commands prompt in the minibuffer for a face name and a color
name, with completion, and then set that face to use the specified
-color.
+color. Changing the colors of the @code{default} face also changes
+the foreground and background colors on all frames, both existing and
+those to be created in the future. (You can also set foreground and
+background colors for the current frame only; see @ref{Frame
+Parameters}.)
Emacs 21 can correctly display variable-width fonts, but Emacs
commands that calculate width and indentation do not know how to
To see what faces are currently defined, and what they look like, type
@kbd{M-x list-faces-display}. It's possible for a given face to look
different in different frames; this command shows the appearance in the
-frame in which you type it. Here's a list of the standardly defined
+frame in which you type it. Here's a list of the standard defined
faces:
@table @code
@item default
This face is used for ordinary text that doesn't specify any other face.
@item mode-line
-This face is used for mode lines. By default, it's drawn with shadows
-for a ``raised'' effect on window systems, and drawn as the inverse of
-the default face on non-windowed terminals. @xref{Display Custom}.
+This face is used for the mode line of the currently selected window.
+By default, it's drawn with shadows for a ``raised'' effect on window
+systems, and drawn as the inverse of the default face on non-windowed
+terminals. @xref{Display Custom}.
+@item mode-line-inactive
+Like @code{mode-line}, but used for mode lines of the windows other
+than the selected one (if @code{mode-line-in-non-selected-windows} is
+non-@code{nil}). This face inherits from @code{mode-line}, so changes
+in that face affect mode lines in all windows.
@item header-line
Similar to @code{mode-line} for a window's header line. Most modes
don't use the header line, but the Info mode does.
+@item minibuffer-prompt
+This face is used for the prompt strings displayed in the minibuffer.
@item highlight
This face is used for highlighting portions of text, in various modes.
For example, mouse-sensitive text is highlighted using this face.
the font are ignored in this case.
@item trailing-whitespace
The face for highlighting trailing whitespace when
-@code{show-trailing-whitespace} is non-nil.
+@code{show-trailing-whitespace} is non-@code{nil}; see @ref{Useless
+Whitespace}.
@item variable-pitch
The basic variable-pitch face.
@end table
@cindex mode, Font Lock
@cindex syntax highlighting and coloring
- Font Lock mode is a minor mode, always local to a particular
-buffer, which highlights (or ``fontifies'') using various faces
-according to the syntax of the text you are editing. It can
-recognize comments and strings in most languages; in several
-languages, it can also recognize and properly highlight various other
-important constructs---for example, names of functions being defined
-or reserved keywords.
+ Font Lock mode is a minor mode, always local to a particular buffer,
+which highlights (or ``fontifies'') using various faces according to
+the syntax of the text you are editing. It can recognize comments and
+strings in most languages; in several languages, it can also recognize
+and properly highlight various other important constructs---for
+example, names of functions being defined or reserved keywords.
+Some special modes, such as Occur mode and Info mode, have completely
+specialized ways of assigning fonts for Font Lock mode.
@findex font-lock-mode
@findex turn-on-font-lock
@c @w is used below to prevent a bad page-break.
@vindex font-lock-beginning-of-syntax-function
+@cindex incorrect fontification
+@cindex parenthesis in column zero and fontification
+@cindex brace in column zero and fontification
Comment and string fontification (or ``syntactic'' fontification)
relies on analysis of the syntactic structure of the buffer text. For
-the purposes of speed, some modes including C mode and Lisp mode rely on
-a special convention: an open-parenthesis in the leftmost column always
-defines the @w{beginning} of a defun, and is thus always outside any string
-or comment. (@xref{Defuns}.) If you don't follow this convention,
-then Font Lock mode can misfontify the text after an open-parenthesis in
+the sake of speed, some modes, including C mode and Lisp mode,
+rely on a special convention: an open-parenthesis or open-brace in the
+leftmost column always defines the @w{beginning} of a defun, and is
+thus always outside any string or comment. (@xref{Left Margin
+Paren}.) If you don't follow this convention, Font Lock mode can
+misfontify the text that follows an open-parenthesis or open-brace in
the leftmost column that is inside a string or comment.
@cindex slow display during scrolling
'(("\\<\\(FIXME\\):" 1 font-lock-warning-face t)))
@end example
+@findex font-lock-remove-keywords
+ To remove keywords from the font-lock highlighting patterns, use the
+function @code{font-lock-remove-keywords}. @xref{Search-based
+Fontification,,,elisp}, for documentation of the format of this list.
+
+@cindex just-in-time (JIT) font-lock
+@cindex background syntax highlighting
+ Fontifying large buffers can take a long time. To avoid large
+delays when a file is visited, Emacs fontifies only the visible
+portion of a buffer. As you scroll through the buffer, each portion
+that becomes visible is fontified as soon as it is displayed. The
+parts of the buffer that are not displayed are fontified
+``stealthily'', in the background, i.e.@: when Emacs is idle. You can
+control this background fontification, called @dfn{Just-In-Time}, or
+@dfn{JIT} Font Lock, by customizing various options in the
+customization group @samp{jit-lock}. @xref{Specific Customization}.
+
@node Highlight Changes
@section Highlight Changes Mode
@findex unhighlight-regexp
Unhighlight @var{regexp} (@code{unhighlight-regexp}). You must enter
one of the regular expressions currently specified for highlighting.
-(You can use completion, or a menu, to enter one of them
+(You can use completion, or choose from a menu, to enter one of them
conveniently.)
@item C-x w l @var{regexp} @key{RET} @var{face} @key{RET}
@findex highlight-lines-matching-regexp
@cindex lines, highlighting
@cindex highlighting lines of text
-Highlight lines containing a match for @var{regexp}, using face
+Highlight entire lines containing a match for @var{regexp}, using face
@var{face} (@code{highlight-lines-matching-regexp}).
@item C-x w b
@code{hi-lock-exclude-modes}.
@end table
-@node Trailing Whitespace
-@section Trailing Whitespace
-
-@cindex trailing whitespace
-@cindex whitespace, trailing
-@vindex show-trailing-whitespace
- It is easy to leave unnecessary spaces at the end of a line without
-realizing it. In most cases, this @dfn{trailing whitespace} has no
-effect, but there are special circumstances where it matters.
-
- You can make trailing whitespace visible on the screen by setting
-the variable @code{show-trailing-whitespace} to @code{t}. Then Emacs
-displays trailing whitespace in the face @code{trailing-whitespace}.
-
- Trailing whitespace is defined as spaces or tabs at the end of a
-line. But trailing whitespace is not displayed specially if point is
-at the end of the line containing the whitespace. (Doing that looks
-ugly while you are typing in new text, and the location of point is
-enough in that case to show you that the spaces are present.)
-
-@vindex indicate-empty-lines
-@vindex default-indicate-empty-lines
-@cindex empty lines
- Emacs can indicate empty lines at the end of the buffer with a
-special bitmap on the left fringe of the window. To enable this
-feature, set the buffer-local variable @code{indicate-empty-lines} to
-a non-@code{nil} value. The default value of this variable is
-controlled by the variable @code{default-indicate-empty-lines};
-by setting that variable, you can enable or disable this feature
-for all new buffers.
-
@node Scrolling
@section Scrolling
@item C-v
Scroll forward (a windowful or a specified number of lines) (@code{scroll-up}).
@item @key{NEXT}
+@itemx @key{PAGEDOWN}
Likewise, scroll forward.
@item M-v
Scroll backward (@code{scroll-down}).
@item @key{PRIOR}
+@itemx @key{PAGEUP}
Likewise, scroll backward.
@item @var{arg} C-l
Scroll so point is on line @var{arg} (@code{recenter}).
@kindex M-v
@kindex NEXT
@kindex PRIOR
+@kindex PAGEDOWN
+@kindex PAGEUP
@findex scroll-up
@findex scroll-down
- The scrolling commands @kbd{C-v} and @kbd{M-v} let you move all the text
-in the window up or down a few lines. @kbd{C-v} (@code{scroll-up}) with an
-argument shows you that many more lines at the bottom of the window, moving
-the text and point up together as @kbd{C-l} might. @kbd{C-v} with a
-negative argument shows you more lines at the top of the window.
-@kbd{M-v} (@code{scroll-down}) is like @kbd{C-v}, but moves in the
-opposite direction. The function keys @key{NEXT} and @key{PRIOR} are
-equivalent to @kbd{C-v} and @kbd{M-v}.
-
- The names of scroll commands are based on the direction that the text
-moves in the window. Thus, the command to scroll forward is called
-@code{scroll-up} because it moves the text upward on the screen.
-
@vindex next-screen-context-lines
- To read the buffer a windowful at a time, use @kbd{C-v} with no argument.
-It takes the last two lines at the bottom of the window and puts them at
-the top, followed by nearly a whole windowful of lines not previously
-visible. If point was in the text scrolled off the top, it moves to the
-new top of the window. @kbd{M-v} with no argument moves backward with
-overlap similarly. The number of lines of overlap across a @kbd{C-v} or
-@kbd{M-v} is controlled by the variable @code{next-screen-context-lines}; by
-default, it is 2.
+ To read the buffer a windowful at a time, use @kbd{C-v}
+(@code{scroll-up}) with no argument. This scrolls forward by nearly
+the whole window height. The effect is to take the two lines at the
+bottom of the window and put them at the top, followed by nearly a
+whole windowful of lines that were not previously visible. If point
+was in the text that scrolled off the top, it ends up at the new top
+of the window.
+
+ @kbd{M-v} (@code{scroll-down}) with no argument scrolls backward in
+a similar way, also with overlap. The number of lines of overlap
+across a @kbd{C-v} or @kbd{M-v} is controlled by the variable
+@code{next-screen-context-lines}; by default, it is 2. The function
+keys @key{NEXT} and @key{PRIOR}, or @key{PAGEDOWN} and @key{PAGEUP},
+are equivalent to @kbd{C-v} and @kbd{M-v}.
+
+ The commands @kbd{C-v} and @kbd{M-v} with a numeric argument scroll
+the text in the selected window up or down a few lines. @kbd{C-v}
+with an argument moves the text and point up, together, that many
+lines; it brings the same number of new lines into view at the bottom
+of the window. @kbd{M-v} with numeric argument scrolls the text
+downward, bringing that many new lines into view at the top of the
+window. @kbd{C-v} with a negative argument is like @kbd{M-v} and vice
+versa.
+
+ The names of scroll commands are based on the direction that the
+text moves in the window. Thus, the command to scroll forward is
+called @code{scroll-up} because it moves the text upward on the
+screen. The keys @key{PAGEDOWN} and @key{PAGEUP} derive their names
+and customary meanings from a different convention that developed
+elsewhere; hence the strange result that @key{PAGEDOWN} runs
+@code{scroll-up}.
@vindex scroll-preserve-screen-position
Some users like the full-screen scroll commands to keep point at the
rather, the text and point move rigidly on the screen. @kbd{C-l} with a
negative argument puts point that many lines from the bottom of the window.
For example, @kbd{C-u - 1 C-l} puts point on the bottom line, and @kbd{C-u
-- 5 C-l} puts it five lines from the bottom. Just @kbd{C-u} as argument,
-as in @kbd{C-u C-l}, scrolls point to the center of the selected window.
+- 5 C-l} puts it five lines from the bottom. @kbd{C-u C-l} scrolls to put
+point at the center (vertically) of the selected window.
@kindex C-M-l
@findex reposition-window
entire current defun onto the screen if possible.
@vindex scroll-conservatively
- Scrolling happens automatically if point has moved out of the visible
-portion of the text when it is time to display. Normally, automatic
-scrolling centers point vertically within the window. However, if you
-set @code{scroll-conservatively} to a small number @var{n}, then if you
-move point just a little off the screen---less than @var{n} lines---then
-Emacs scrolls the text just far enough to bring point back on screen.
-By default, @code{scroll-conservatively} is 0.
+ Scrolling happens automatically when point moves out of the visible
+portion of the text. Normally, automatic scrolling centers point
+vertically within the window. However, if you set
+@code{scroll-conservatively} to a small number @var{n}, then if you
+move point just a little off the screen---less than @var{n}
+lines---then Emacs scrolls the text just far enough to bring point
+back on screen. By default, @code{scroll-conservatively} is 0.
@cindex aggressive scrolling
@vindex scroll-up-aggressively
-@vindex scroll-down-aggressively
+@vindex scroll-down-aggressively
When the window does scroll by a longer distance, you can control
how aggressively it scrolls, by setting the variables
@code{scroll-up-aggressively} and @code{scroll-down-aggressively}.
@dfn{Horizontal scrolling} means shifting all the lines sideways
within a window---so that some of the text near the left margin is not
-displayed at all. Emacs does this automatically, in any window that
+displayed at all. Emacs does this automatically in any window that
uses line truncation rather than continuation: whenever point moves
off the left or right edge of the screen, Emacs scrolls the buffer
horizontally to make point visible.
to scroll the window, but never farther to the right than the amount
you previously set by @code{scroll-left}.
-@vindex automatic-hscrolling
+@vindex hscroll-margin
+ The value of the variable @code{hscroll-margin} controls how close
+to the window's edges point is allowed to get before the window will
+be automatically scrolled. It is measured in columns. If the value
+is 5, then moving point within 5 columns of the edge causes horizontal
+scrolling away from that edge.
+
+@vindex hscroll-step
+ The variable @code{hscroll-step} determines how many columns to
+scroll the window when point gets too close to the edge. If it's
+zero, horizontal scrolling centers point horizontally within the
+window. If it's a positive integer, it specifies the number of
+columns to scroll by. If it's a floating-point number, it specifies
+the fraction of the window's width to scroll by. The default is zero.
+
+@vindex auto-hscroll-mode
To disable automatic horizontal scrolling, set the variable
-@code{automatic-hscrolling} to @code{nil}.
+@code{auto-hscroll-mode} to @code{nil}.
+
+@node Fringes
+@section Window Fringes
+@cindex fringes
+
+ On a graphical display, each Emacs window normally has narrow
+@dfn{fringes} on the left and right edges. The fringes display
+indications about the text in the window.
+
+ The most common use of the fringes is to indicate a continuation
+line, when one line of text is split into multiple lines on the
+screen. The left fringe shows a curving arrow for each screen line
+except the first, indicating that ``this is not the real beginning.''
+The right fringe shows a curving arrow for each screen line except the
+last, indicating that ``this is not the real end.''
+
+ The fringes indicate line truncation with short horizontal arrows
+meaning ``there's more text on this line which is scrolled
+horizontally out of view;'' clicking the mouse on one of the arrows
+scrolls the display horizontally in the direction of the arrow. The
+fringes also indicate other things such as empty lines, or where a
+program you are debugging is executing (@pxref{Debuggers}).
+
+@findex set-fringe-style
+@findex fringe-mode
+ You can enable and disable the fringes for all frames using
+@kbd{M-x fringe-mode}. To enable and disable the fringes
+for the selected frame, use @kbd{M-x set-fringe-style}.
+
+@node Useless Whitespace
+@section Useless Whitespace
+
+@cindex trailing whitespace
+@cindex whitespace, trailing
+@vindex show-trailing-whitespace
+ It is easy to leave unnecessary spaces at the end of a line, or
+empty lines at the end of a file, without realizing it. In most
+cases, this @dfn{trailing whitespace} has no effect, but there are
+special circumstances where it matters.
+
+ You can make trailing whitespace at the end of a line visible on the
+screen by setting the buffer-local variable
+@code{show-trailing-whitespace} to @code{t}. Then Emacs displays
+trailing whitespace in the face @code{trailing-whitespace}.
+
+ This feature does not apply when point is at the end of the line
+containing the whitespace. Strictly speaking, that is ``trailing
+whitespace'' nonetheless, but displaying it specially in that case
+looks ugly while you are typing in new text. In this special case,
+the location of point is enough to show you that the spaces are
+present.
+
+@findex delete-trailing-whitespace
+ To delete all trailing whitespace within the current buffer's
+accessible portion (@pxref{Narrowing}), type @kbd{M-x
+delete-trailing-whitespace @key{RET}}. (This command does not remove
+the form-feed characters.)
+
+@vindex indicate-unused-lines
+@vindex default-indicate-empty-lines
+@cindex unused lines
+@cindex fringes, and unused line indication
+ Emacs can indicate unused lines at the end of the window with a
+small image in the left fringe (@pxref{Fringes}). The image appears
+for window lines that do not correspond to any buffer text. Blank
+lines at the end of the buffer then stand out because they do not have
+this image in the fringe.
+
+ To enable this feature, set the buffer-local variable
+@code{indicate-unused-lines} to a non-@code{nil} value. The default
+value of this variable is controlled by the variable
+@code{default-indicate-unused-lines}; by setting that variable, you
+can enable or disable this feature for all new buffers. (This feature
+currently doesn't work on character terminals.)
@node Follow Mode
@section Follow Mode
indicate what it is. @xref{Minor Modes}, for more information about
minor modes and about how to use this command.
+@cindex narrowing, and line number display
+ If you have narrowed the buffer (@pxref{Narrowing}), the displayed
+line number is relative to the accessible portion of the buffer.
+
@vindex line-number-display-limit
If the buffer is very large (larger than the value of
@code{line-number-display-limit}), then the line number doesn't appear.
Emacs doesn't compute the line number when the buffer is large, because
-that would be too slow. Set it to @code{nil} to remove the limit. If
-you have narrowed the buffer (@pxref{Narrowing}), the displayed line
-number is relative to the accessible portion of the buffer.
+that would be too slow. Set it to @code{nil} to remove the limit.
+
+@vindex line-number-display-limit-width
+ Line-number computation can also be slow if the lines in the buffer
+are too long. For this reason, Emacs normally doesn't display line
+numbers if the average width, in characters, of lines near point is
+larger than the value of the variable
+@code{line-number-display-limit-width}. The default value is 200
+characters.
@cindex Column Number mode
@cindex mode, Column Number
@cindex mail (on mode line)
@vindex display-time-use-mail-icon
@vindex display-time-mail-face
+@vindex display-time-mail-file
+@vindex display-time-mail-directory
The word @samp{Mail} appears after the load level if there is mail
for you that you have not read yet. On a graphical display you can use
an icon instead of @samp{Mail} by customizing
@code{display-time-use-mail-icon}; this may save some space on the mode
line. You can customize @code{display-time-mail-face} to make the mail
-indicator prominent.
+indicator prominent. Use @code{display-time-mail-file} to specify
+the mail file to check, or set @code{display-time-mail-directory}
+to specify the directory to check for incoming mail (any nonempty regular
+file in the directory is considered as ``newly arrived mail'').
-@cindex mode line, 3D appearence
+@cindex mode line, 3D appearance
@cindex attributes of mode line, changing
@cindex non-integral number of lines in a window
- By default, the mode line is drawn on graphics displays as a 3D
-released button. Depending on the font used for the mode line's text,
-this might make the mode line use more space than a text line in a
-window, and cause the last line of the window be partially obscured.
-That is, the window displays a non-integral number of text lines. If
-you don't like this effect, you can disable the 3D appearence of the
-mode line by customizing the attributes of the @code{mode-line} face in
-your @file{.emacs} init file, like this:
+ By default, the mode line is drawn on graphics displays with
+3D-style highlighting, like that of a button when it is not being
+pressed. If you don't like this effect, you can disable the 3D
+highlighting of the mode line, by customizing the attributes of the
+@code{mode-line} face in your @file{.emacs} init file, like this:
@example
- (set-face-attribute 'mode-line nil :box nil)
+(set-face-attribute 'mode-line nil :box nil)
@end example
@noindent
-Alternatively, you could turn off the box attribute in your
+Alternatively, you can turn off the box attribute in your
@file{.Xdefaults} file:
@example
- Emacs.mode-line.AttributeBox: off
+Emacs.mode-line.AttributeBox: off
@end example
+@cindex non-selected windows, mode line appearance
+ By default, the mode line of nonselected windows is displayed in a
+different face, called @code{mode-line-inactive}. Only the selected
+window is displayed in the @code{mode-line} face. This helps show
+which window is selected. When the minibuffer is selected, since
+it has no mode line, the window from which you activated the minibuffer
+has its mode line displayed using @code{mode-line}; as a result,
+ordinary entry to the minibuffer does not change any mode lines.
+
+@vindex mode-line-in-non-selected-windows
+ You can disable use of @code{mode-line-inactive} by setting variable
+@code{mode-line-in-non-selected-windows} to @code{nil}; then all mode
+lines are displayed in the @code{mode-line} face.
+
@node Text Display
@section How Text Is Displayed
@cindex characters (in text)
ASCII printing characters (octal codes 040 through 0176) in Emacs
-buffers are displayed with their graphics. So are non-ASCII multibyte
+buffers are displayed with their graphics, as are non-ASCII multibyte
printing characters (octal codes above 0400).
Some ASCII control characters are displayed in special ways. The
octal escape sequences; thus, character code 0230 (octal) is displayed
as @samp{\230}. The display of character codes 0240 through 0377
(octal) may be either as escape sequences or as graphics. They do not
-normally occur in multibyte buffers but if they do, they are displayed
+normally occur in multibyte buffers, but if they do, they are displayed
as Latin-1 graphics. In unibyte mode, if you enable European display
they are displayed using their graphics (assuming your terminal supports
them), otherwise as escape sequences. @xref{Single-Byte Character
The variable @code{mode-line-inverse-video} is an obsolete way of
controlling whether the mode line is displayed in inverse video; the
preferred way of doing this is to change the @code{mode-line} face.
-@xref{Mode Line}. If you specify the foreground color for the
-@code{mode-line} face, and @code{mode-line-inverse-video} is
-non-@code{nil}, then the default background color for that face is the
-usual foreground color. @xref{Faces}.
+@xref{Mode Line}. However, if @code{mode-line-inverse-video} has a
+value of @code{nil}, then the @code{mode-line} face will be ignored,
+and mode-lines will be drawn using the default text face.
+@xref{Faces}.
@vindex inverse-video
If the variable @code{inverse-video} is non-@code{nil}, Emacs attempts
to start, or zero meaning don't echo at all. @xref{Echo Area}.
@vindex ctl-arrow
- If the variable @code{ctl-arrow} is @code{nil}, control characters in
+ If the variable @code{ctl-arrow} is @code{nil}, all control characters in
the buffer are displayed with octal escape sequences, except for newline
and tab. Altering the value of @code{ctl-arrow} makes it local to the
current buffer; until that time, the default value is in effect. The
amount of time Emacs must remain busy before the busy indicator is
displayed, by setting the variable @code{hourglass-delay}.
+@findex tty-suppress-bold-inverse-default-colors
+ On some text-only terminals, bold face and inverse video together
+result in text that is hard to read. Call the function
+@code{tty-suppress-bold-inverse-default-colors} with a non-@code{nil}
+argument to suppress the effect of bold-face in this case.
+
@node Cursor Display
@section Displaying the Cursor
-@findex hl-line-mode
@findex blink-cursor-mode
+@vindex blink-cursor-alist
@cindex cursor, locating visually
@cindex cursor, blinking
- There are a number of ways to customize the display of the cursor.
-@kbd{M-x hl-line-mode} enables or disables a global minor mode which
-highlights the line containing point. On window systems, the command
-@kbd{M-x blink-cursor-mode} turns on or off the blinking of the
-cursor. (On terminals, the terminal itself blinks the cursor, and
-Emacs has no control over it.)
-
You can customize the cursor's color, and whether it blinks, using
-the @code{cursor} Custom group (@pxref{Easy Customization}).
+the @code{cursor} Custom group (@pxref{Easy Customization}). On
+graphical terminals, the command @kbd{M-x blink-cursor-mode} enables
+or disables the blinking of the cursor. (On text terminals, the
+terminal itself blinks the cursor, and Emacs has no control over it.)
+You can control how the cursor appears when it blinks off by setting
+the variable @code{blink-cursor-alist}.
+
+@cindex cursor in non-selected windows
+@vindex cursor-in-non-selected-windows
+ Normally, the cursor appears in non-selected windows in the ``off''
+state, with the same appearance as when the blinking cursor blinks
+``off''. For a box cursor, this is a hollow box; for a bar cursor,
+this is a thinner bar. To turn off cursors in non-selected windows,
+customize the option @code{cursor-in-non-selected-windows} and assign
+it a @code{nil} value.
@vindex x-stretch-cursor
@cindex wide block cursor
- When displaying on a window system, Emacs can optionally draw the
-block cursor as wide as the character under the cursor---for example,
-if the cursor is on a tab character, it would cover the full width
-occupied by that tab character. To enable this feature, set the
-variable @code{x-stretch-cursor} to a non-@code{nil} value.
+ On graphical terminals, Emacs can optionally draw the block cursor
+as wide as the character under the cursor---for example, if the cursor
+is on a tab character, it would cover the full width occupied by that
+tab character. To enable this feature, set the variable
+@code{x-stretch-cursor} to a non-@code{nil} value.
-@cindex cursor in non-selected windows
-@vindex cursor-in-non-selected-windows
- Normally, the cursor in non-selected windows is shown as a hollow box.
-To turn off cursor display in non-selected windows, customize the option
-@code{cursor-in-non-selected-windows} to assign it a @code{nil} value.
+@findex hl-line-mode
+@findex global-hl-line-mode
+@cindex highlight current line
+ If you find it hard to see the cursor, you might like HL Line mode,
+a minor mode that highlights the line containing point. Use @kbd{M-x
+hl-line-mode} to enable or disable it in the current buffer. @kbd{M-x
+global-hl-line-mode} enables or disables the same mode globally.
+
+@ignore
+ arch-tag: 2219f910-2ff0-4521-b059-1bd231a536c4
+@end ignore
HCoop / bpt / emacs.git / blobdiff