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[Emacs-diffs] Changes to display.texi
|
From: |
Glenn Morris |
|
Subject: |
[Emacs-diffs] Changes to display.texi |
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Date: |
Thu, 06 Sep 2007 04:35:07 +0000 |
CVSROOT: /sources/emacs
Module name: emacs
Changes by: Glenn Morris <gm> 07/09/06 04:35:07
Index: display.texi
===================================================================
RCS file: display.texi
diff -N display.texi
--- display.texi 8 Jun 2007 10:39:56 -0000 1.131
+++ /dev/null 1 Jan 1970 00:00:00 -0000
@@ -1,1259 +0,0 @@
address@hidden This is part of the Emacs manual.
address@hidden Copyright (C) 1985, 1986, 1987, 1993, 1994, 1995, 1997, 2000,
2001,
address@hidden 2002, 2003, 2004, 2005, 2006, 2007 Free Software Foundation,
Inc.
address@hidden See file emacs.texi for copying conditions.
address@hidden Display, Search, Registers, Top
address@hidden Controlling the Display
-
- Since only part of a large buffer fits in the window, Emacs tries to
-show a part that is likely to be interesting. Display-control
-commands allow you to specify which part of the text you want to see,
-and how to display it. Many variables also affect the details of
-redisplay. Unless otherwise stated, the variables described in this
-chapter have their effect by customizing redisplay itself; therefore,
-their values only make a difference at the time of redisplay.
-
address@hidden
-* Scrolling:: Commands to move text up and down in a window.
-* Auto Scrolling:: Redisplay scrolls text automatically when needed.
-* Horizontal Scrolling:: Moving text left and right in a window.
-* Follow Mode:: Follow mode lets two windows scroll as one.
-* Faces:: How to change the display style using faces.
-* Standard Faces:: Emacs' predefined faces.
-* Font Lock:: Minor mode for syntactic highlighting using faces.
-* Highlight Interactively:: Tell Emacs what text to highlight.
-* Fringes:: Enabling or disabling window fringes.
-* Displaying Boundaries:: Displaying top and bottom of the buffer.
-* Useless Whitespace:: Showing possibly-spurious trailing whitespace.
-* Selective Display:: Hiding lines with lots of indentation.
-* Optional Mode Line:: Optional mode line display features.
-* Text Display:: How text characters are normally displayed.
-* Cursor Display:: Features for displaying the cursor.
-* Line Truncation:: Truncating lines to fit the screen width instead
- of continuing them to multiple screen lines.
-* Display Custom:: Information on variables for customizing display.
address@hidden menu
-
address@hidden Scrolling
address@hidden Scrolling
-
- If a buffer contains text that is too large to fit entirely within a
-window that is displaying the buffer, Emacs shows a contiguous portion of
-the text. The portion shown always contains point.
-
address@hidden scrolling
- @dfn{Scrolling} means moving text up or down in the window so that
-different parts of the text are visible. Scrolling ``forward'' or
-``up'' means that text moves up, and new text appears at the bottom.
-Scrolling ``backward'' or ``down'' moves text down, and new text
-appears at the top.
-
- Scrolling happens automatically if you move point past the bottom or
-top of the window. You can also scroll explicitly with the commands
-in this section.
-
address@hidden @kbd
address@hidden C-l
-Clear screen and redisplay, scrolling the selected window to center
-point vertically within it (@code{recenter}).
address@hidden C-v
-Scroll forward (a windowful or a specified number of lines) (@code{scroll-up}).
address@hidden @key{NEXT}
address@hidden @key{PAGEDOWN}
-Likewise, scroll forward.
address@hidden M-v
-Scroll backward (@code{scroll-down}).
address@hidden @key{PRIOR}
address@hidden @key{PAGEUP}
-Likewise, scroll backward.
address@hidden @var{arg} C-l
-Scroll so point is on line @var{arg} (@code{recenter}).
address@hidden C-M-l
-Scroll heuristically to bring useful information onto the screen
-(@code{reposition-window}).
address@hidden table
-
address@hidden C-l
address@hidden recenter
- The most basic scrolling command is @kbd{C-l} (@code{recenter}) with
-no argument. It scrolls the selected window so that point is halfway
-down from the top of the window. On a text terminal, it also clears
-the screen and redisplays all windows. That is useful in case the
-screen is garbled (@pxref{Screen Garbled}).
-
address@hidden C-v
address@hidden M-v
address@hidden NEXT
address@hidden PRIOR
address@hidden PAGEDOWN
address@hidden PAGEUP
address@hidden scroll-up
address@hidden scroll-down
- 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.
-
address@hidden next-screen-context-lines
- @kbd{M-v} (@code{scroll-down}) with no argument scrolls backward in
-a similar way, also with overlap. The number of lines of overlap that
-the @kbd{C-v} or @kbd{M-v} commands leave 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
address@hidden, 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
address@hidden
-
address@hidden scroll-preserve-screen-position
- Some users like the full-screen scroll commands to keep point at the
-same screen line. To enable this behavior, set the variable
address@hidden to a address@hidden value. In
-this mode, when these commands would scroll the text around point off
-the screen, or within @code{scroll-margin} lines of the edge, they
-move point to keep the same vertical position within the window.
-This mode is convenient for browsing through a file by scrolling by
-screenfuls; if you come back to the screen where you started, point
-goes back to the line where it started. However, this mode is
-inconvenient when you move to the next screen in order to move point
-to the text there.
-
- Another way to do scrolling is with @kbd{C-l} with a numeric argument.
address@hidden does not clear the screen when given an argument; it only scrolls
-the selected window. With a positive argument @var{n}, it repositions text
-to put point @var{n} lines down from the top. An argument of zero puts
-point on the very top line. Point does not move with respect to the text;
-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. @kbd{C-u C-l} scrolls to put
-point at the center (vertically) of the selected window.
-
address@hidden C-M-l
address@hidden reposition-window
- The @kbd{C-M-l} command (@code{reposition-window}) scrolls the current
-window heuristically in a way designed to get useful information onto
-the screen. For example, in a Lisp file, this command tries to get the
-entire current defun onto the screen if possible.
-
address@hidden Auto Scrolling
address@hidden Automatic Scrolling
-
address@hidden scroll-conservatively
- Redisplay scrolls the buffer automatically when point moves out of
-the visible portion of the text. The purpose of automatic scrolling
-is to make point visible, but you can customize many aspects of how
-this is done.
-
- 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,
address@hidden address@hidden
-
address@hidden aggressive scrolling
address@hidden scroll-up-aggressively
address@hidden scroll-down-aggressively
- When the window does scroll by a longer distance, you can control
-how aggressively it scrolls, by setting the variables
address@hidden and @code{scroll-down-aggressively}.
-The value of @code{scroll-up-aggressively} should be either
address@hidden, or a fraction @var{f} between 0 and 1. A fraction
-specifies where on the screen to put point when scrolling upward.
-More precisely, when a window scrolls up because point is above the
-window start, the new start position is chosen to put point @var{f}
-part of the window height from the top. The larger @var{f}, the more
-aggressive the scrolling.
-
- @code{nil}, which is the default, scrolls to put point at the center.
-So it is equivalent to .5.
-
- Likewise, @code{scroll-down-aggressively} is used for scrolling
-down. The value, @var{f}, specifies how far point should be placed
-from the bottom of the window; thus, as with
address@hidden, a larger value is more aggressive.
-
address@hidden scroll-margin
- The variable @code{scroll-margin} restricts how close point can come
-to the top or bottom of a window. Its value is a number of screen
-lines; if point comes within that many lines of the top or bottom of the
-window, Emacs recenters the window. By default, @code{scroll-margin} is
-0.
-
address@hidden Horizontal Scrolling
address@hidden Horizontal Scrolling
address@hidden horizontal scrolling
-
- @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. When the text in a window is scrolled horizontally,
-text lines are truncated rather than continued (@pxref{Line
-Truncation}). Whenever a window shows truncated lines, Emacs
-automatically updates its horizontal scrolling whenever point moves
-off the left or right edge of the screen. You can also use these
-commands to do explicit horizontal scrolling.
-
address@hidden @kbd
address@hidden C-x <
-Scroll text in current window to the left (@code{scroll-left}).
address@hidden C-x >
-Scroll to the right (@code{scroll-right}).
address@hidden table
-
address@hidden C-x <
address@hidden C-x >
address@hidden scroll-left
address@hidden scroll-right
- The command @kbd{C-x <} (@code{scroll-left}) scrolls the selected
-window to the left by @var{n} columns with argument @var{n}. This moves
-part of the beginning of each line off the left edge of the window.
-With no argument, it scrolls by almost the full width of the window (two
-columns less, to be precise).
-
- @kbd{C-x >} (@code{scroll-right}) scrolls similarly to the right. The
-window cannot be scrolled any farther to the right once it is displayed
-normally (with each line starting at the window's left margin);
-attempting to do so has no effect. This means that you don't have to
-calculate the argument precisely for @address@hidden >}}; any sufficiently
large
-argument will restore the normal display.
-
- If you use those commands to scroll a window horizontally, that sets
-a lower bound for automatic horizontal scrolling. Automatic scrolling
-will continue to scroll the window, but never farther to the right
-than the amount you previously set by @code{scroll-left}.
-
address@hidden 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.
-
address@hidden 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.
-
address@hidden auto-hscroll-mode
- To disable automatic horizontal scrolling, set the variable
address@hidden to @code{nil}.
-
address@hidden Follow Mode
address@hidden Follow Mode
address@hidden Follow mode
address@hidden mode, Follow
address@hidden follow-mode
address@hidden windows, synchronizing
address@hidden synchronizing windows
-
- @dfn{Follow mode} is a minor mode that makes two windows, both
-showing the same buffer, scroll as a single tall ``virtual window.''
-To use Follow mode, go to a frame with just one window, split it into
-two side-by-side windows using @kbd{C-x 3}, and then type @kbd{M-x
-follow-mode}. From then on, you can edit the buffer in either of the
-two windows, or scroll either one; the other window follows it.
-
- In Follow mode, if you move point outside the portion visible in one
-window and into the portion visible in the other window, that selects
-the other window---again, treating the two as if they were parts of
-one large window.
-
- To turn off Follow mode, type @kbd{M-x follow-mode} a second time.
-
address@hidden Faces
address@hidden Using Multiple Typefaces
address@hidden faces
-
- You can specify various styles for displaying text using
address@hidden 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 most of them from another face.
-
- On graphical display, all the Emacs face attributes are meaningful.
-On a text-only terminal, only some of them work. Some text-only
-terminals support inverse video, bold, and underline attributes; some
-support colors. Text-only terminals generally do not support changing
-the height and width or the font family.
-
- Emacs uses faces automatically for highlighting, through the work of
-Font Lock mode. @xref{Font Lock}, for more information about Font
-Lock mode and syntactic highlighting. You can print out the buffer
-with the highlighting that appears on your screen using the command
address@hidden @xref{PostScript}.
-
- You control the appearance of a part of the text in the buffer by
-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 @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.
address@hidden Faces}, for how to specify the font for text in the
-buffer. @xref{Format Colors}, for how to specify the foreground and
-background color.
-
address@hidden face colors, setting
address@hidden set-face-foreground
address@hidden set-face-background
- To alter the appearance of a face, use the customization buffer.
address@hidden Customization}. You can also use X resources to specify
-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. 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}.)
-
- If you want to alter the appearance of all Emacs frames, you need to
-customize the frame parameters in the variable
address@hidden; see @ref{Creating Frames,
-default-frame-alist}.
-
- Emacs can correctly display variable-width fonts, but Emacs commands
-that calculate width and indentation do not know how to calculate
-variable widths. This can sometimes lead to incorrect results when
-you use variable-width fonts. In particular, indentation commands can
-give inconsistent results, so we recommend you avoid variable-width
-fonts for editing program source code. Filling will sometimes make
-lines too long or too short. We plan to address these issues in
-future Emacs versions.
-
address@hidden Standard Faces
address@hidden Standard Faces
-
address@hidden list-faces-display
- 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. With a prefix argument, this
-prompts for a regular expression, and displays only faces with names
-matching that regular expression.
-
- Here are the standard faces for specifying text appearance. You can
-apply them to specific text when you want the effects they produce.
-
address@hidden @code
address@hidden default
-This face is used for ordinary text that doesn't specify any face.
address@hidden bold
-This face uses a bold variant of the default font, if it has one.
-It's up to you to choose a default font that has a bold variant,
-if you want to use one.
address@hidden italic
-This face uses an italic variant of the default font, if it has one.
address@hidden bold-italic
-This face uses a bold italic variant of the default font, if it has one.
address@hidden underline
-This face underlines text.
address@hidden fixed-pitch
-This face forces use of a particular fixed-width font.
address@hidden variable-pitch
-This face forces use of a particular variable-width font. It's
-reasonable to customize this face to use a different variable-width font,
-if you like, but you should not make it a fixed-width font.
address@hidden shadow
-This face is used for making the text less noticeable than the surrounding
-ordinary text. Usually this can be achieved by using shades of gray in
-contrast with either black or white default foreground color.
address@hidden table
-
- Here's an incomplete list of faces used to highlight parts of the
-text temporarily for specific purposes. (Many other modes define
-their own faces for this purpose.)
-
address@hidden @code
address@hidden highlight
-This face is used for highlighting portions of text, in various modes.
-For example, mouse-sensitive text is highlighted using this face.
address@hidden isearch
-This face is used for highlighting the current Isearch match.
address@hidden query-replace
-This face is used for highlighting the current Query Replace match.
address@hidden lazy-highlight
-This face is used for lazy highlighting of Isearch and Query Replace
-matches other than the current one.
address@hidden region
-This face is used for displaying a selected region (when Transient Mark
-mode is enabled---see below).
address@hidden secondary-selection
-This face is used for displaying a secondary X selection (@pxref{Secondary
-Selection}).
address@hidden trailing-whitespace
-The face for highlighting excess spaces and tabs at the end of a line
-when @code{show-trailing-whitespace} is address@hidden; see
address@hidden Whitespace}.
address@hidden nobreak-space
-The face for displaying the character ``nobreak space.''
address@hidden escape-glyph
-The face for highlighting the @samp{\} or @samp{^} that indicates
-a control character. It's also used when @samp{\} indicates a
-nobreak space or nobreak (soft) hyphen.
address@hidden table
-
address@hidden @code{region} face
- When Transient Mark mode is enabled, the text of the region is
-highlighted when the mark is active. This uses the face named
address@hidden; you can control the style of highlighting by changing the
-style of this face (@pxref{Face Customization}). @xref{Transient Mark},
-for more information about Transient Mark mode and activation and
-deactivation of the mark.
-
- These faces control the appearance of parts of the Emacs frame.
-They exist as faces to provide a consistent way to customize the
-appearance of these parts of the frame.
-
address@hidden @code
address@hidden mode-line
address@hidden modeline
-This face is used for the mode line of the currently selected window,
-and for menu bars when toolkit menus are not used. By default, it's
-drawn with shadows for a ``raised'' effect on graphical displays, and
-drawn as the inverse of the default face on non-windowed terminals.
address@hidden is an alias for the @code{mode-line} face, for
-compatibility with old Emacs versions.
address@hidden 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
address@hidden). This face inherits from @code{mode-line}, so changes
-in that face affect mode lines in all windows.
address@hidden mode-line-highlight
-Like @code{highlight}, but used for portions of text on mode lines.
address@hidden mode-line-buffer-id
-This face is used for buffer identification parts in the mode line.
address@hidden header-line
-Similar to @code{mode-line} for a window's header line, which appears
-at the top of a window just as the mode line appears at the bottom.
-Most windows do not have a header line---only some special modes, such
-Info mode, create one.
address@hidden vertical-border
-This face is used for the vertical divider between windows.
-By default this face inherits from the @code{mode-line-inactive} face
-on character terminals. On graphical displays the foreground color of
-this face is used for the vertical line between windows without
-scrollbars.
address@hidden minibuffer-prompt
address@hidden @code{minibuffer-prompt} face
address@hidden minibuffer-prompt-properties
-This face is used for the prompt strings displayed in the minibuffer.
-By default, Emacs automatically adds this face to the value of
address@hidden, which is a list of text
-properties used to display the prompt text. (This variable takes
-effect when you enter the minibuffer.)
address@hidden fringe
address@hidden @code{fringe} face
-The face for the fringes to the left and right of windows on graphic
-displays. (The fringes are the narrow portions of the Emacs frame
-between the text area and the window's right and left borders.)
address@hidden
address@hidden scroll-bar
-This face determines the visual appearance of the scroll bar.
address@hidden Bars}.
address@hidden border
-This face determines the color of the frame border.
address@hidden cursor
-This face determines the color of the cursor.
address@hidden mouse
-This face determines the color of the mouse pointer.
address@hidden tool-bar
-This face determines the color of tool bar icons. @xref{Tool Bars}.
address@hidden tooltip
-This face is used for tooltips. @xref{Tooltips}.
address@hidden menu
address@hidden menu bar appearance
address@hidden @code{menu} face, no effect if customized
address@hidden customization of @code{menu} face
-This face determines the colors and font of Emacs's menus. @xref{Menu
-Bars}. Setting the font of LessTif/Motif menus is currently not
-supported; attempts to set the font are ignored in this case.
-Likewise, attempts to customize this face in Emacs built with GTK and
-in the MS-Windows/Mac ports are ignored by the respective GUI toolkits;
-you need to use system-wide styles and options to change the
-appearance of the menus.
address@hidden table
-
address@hidden Font Lock
address@hidden Font Lock mode
address@hidden Font Lock mode
address@hidden mode, Font Lock
address@hidden syntax highlighting and coloring
-
- Font Lock mode is a minor mode, always local to a particular buffer,
-which highlights (or ``fontifies'') the buffer contents 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.
-
address@hidden font-lock-mode
- Font Lock mode is turned on by default in all modes which support it.
-You can toggle font-lock for each buffer with the command @kbd{M-x
-font-lock-mode}. Using a positive argument unconditionally turns Font
-Lock mode on, and a negative or zero argument turns it off.
-
address@hidden global-font-lock-mode
address@hidden global-font-lock-mode
- If you do not wish Font Lock mode to be turned on by default,
-customize the variable @code{global-font-lock-mode} using the Customize
-interface (@pxref{Easy Customization}), or use the function
address@hidden in your @file{.emacs} file, like this:
-
address@hidden
-(global-font-lock-mode 0)
address@hidden example
-
address@hidden
-This variable, like all the variables that control Font Lock mode,
-take effect whenever fontification is done; that is, potentially at
-any time.
-
address@hidden turn-on-font-lock
- If you have disabled Global Font Lock mode, you can still enable Font
-Lock for specific major modes by adding the function
address@hidden to the mode hooks (@pxref{Hooks}). For
-example, to enable Font Lock mode for editing C files, you can do this:
-
address@hidden
-(add-hook 'c-mode-hook 'turn-on-font-lock)
address@hidden example
-
- Font Lock mode uses several specifically named faces to do its job,
-including @code{font-lock-string-face}, @code{font-lock-comment-face},
-and others. The easiest way to find them all is to use @kbd{M-x
-customize-group @key{RET} font-lock-faces @key{RET}}. You can then
-use that customization buffer to customize the appearance of these
-faces. @xref{Face Customization}.
-
- You can also customize these faces using @kbd{M-x
-set-face-foreground} or @kbd{M-x set-face-background}. @xref{Faces}.
-
address@hidden font-lock-maximum-decoration
- The variable @code{font-lock-maximum-decoration} specifies the
-preferred level of fontification, for modes that provide multiple
-levels. Level 1 is the least amount of fontification; some modes
-support levels as high as 3. The normal default is ``as high as
-possible.'' You can specify an integer, which applies to all modes, or
-you can specify different numbers for particular major modes; for
-example, to use level 1 for C/C++ modes, and the default level
-otherwise, use this:
-
address@hidden
-(setq font-lock-maximum-decoration
- '((c-mode . 1) (c++-mode . 1)))
address@hidden example
-
address@hidden font-lock-maximum-size
- Fontification can be too slow for large buffers, so you can suppress
-it for buffers above a certain size. The variable
address@hidden specifies a buffer size, beyond which
-buffer fontification is suppressed.
-
address@hidden @w is used below to prevent a bad page-break.
address@hidden font-lock-beginning-of-syntax-function
address@hidden incorrect fontification
address@hidden parenthesis in column zero and fontification
address@hidden 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 sake of speed, some modes, including 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.
-
address@hidden slow display during scrolling
- The variable @code{font-lock-beginning-of-syntax-function} (always
-buffer-local) specifies how Font Lock mode can find a position
-guaranteed to be outside any comment or string. In modes which use the
-leftmost column parenthesis convention, the default value of the variable
-is @code{beginning-of-defun}---that tells Font Lock mode to use the
-convention. If you set this variable to @code{nil}, Font Lock no longer
-relies on the convention. This avoids incorrect results, but the price
-is that, in some cases, fontification for a changed text must rescan
-buffer text from the beginning of the buffer. This can considerably
-slow down redisplay while scrolling, particularly if you are close to
-the end of a large buffer.
-
address@hidden font-lock-add-keywords
- Font Lock highlighting patterns already exist for many modes, but you
-may want to fontify additional patterns. You can use the function
address@hidden, to add your own highlighting patterns for
-a particular mode. For example, to highlight @samp{FIXME:} words in C
-comments, use this:
-
address@hidden
-(font-lock-add-keywords
- 'c-mode
- '(("\\<\\(FIXME\\):" 1 font-lock-warning-face t)))
address@hidden example
-
address@hidden 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, The Emacs Lisp Reference Manual}, for
-documentation of the format of this list.
-
address@hidden just-in-time (JIT) font-lock
address@hidden 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, also called @dfn{Just-In-Time}
-(or @dfn{JIT}) Lock, by customizing variables in the customization
-group @samp{jit-lock}. @xref{Specific Customization}.
-
address@hidden Highlight Interactively
address@hidden Interactive Highlighting
address@hidden highlighting by matching
address@hidden interactive highlighting
address@hidden Highlight Changes mode
-
address@hidden highlight-changes-mode
- Use @kbd{M-x highlight-changes-mode} to enable (or disable)
-Highlight Changes mode, a minor mode that uses faces (colors,
-typically) to indicate which parts of the buffer were changed most
-recently.
-
address@hidden Hi Lock mode
address@hidden hi-lock-mode
- Hi Lock mode highlights text that matches regular expressions you
-specify. For example, you might wish to see all the references to a
-certain variable in a program source file, highlight certain parts in
-a voluminous output of some program, or make certain names stand out
-in an article. Use the @kbd{M-x hi-lock-mode} command to enable (or
-disable) Hi Lock mode. To enable Hi Lock mode for all buffers, use
address@hidden global-hi-lock-mode} or place @code{(global-hi-lock-mode 1)}
-in your @file{.emacs} file.
-
- Hi Lock mode works like Font Lock mode (@pxref{Font Lock}), except
-that you specify explicitly the regular expressions to highlight. You
-control them with these commands:
-
address@hidden @kbd
address@hidden C-x w h @var{regexp} @key{RET} @var{face} @key{RET}
address@hidden C-x w h
address@hidden highlight-regexp
-Highlight text that matches @var{regexp} using face @var{face}
-(@code{highlight-regexp}). The highlighting will remain as long as
-the buffer is loaded. For example, to highlight all occurrences of
-the word ``whim'' using the default face (a yellow background)
address@hidden w h whim @key{RET} @key{RET}}. Any face can be used for
-highlighting, Hi Lock provides several of its own and these are
-pre-loaded into a history list. While being prompted for a face use
address@hidden and @kbd{M-n} to cycle through them.
-
-You can use this command multiple times, specifying various regular
-expressions to highlight in different ways.
-
address@hidden C-x w r @var{regexp} @key{RET}
address@hidden C-x w r
address@hidden unhighlight-regexp
-Unhighlight @var{regexp} (@code{unhighlight-regexp}).
-
-If you invoke this from the menu, you select the expression to
-unhighlight from a list. If you invoke this from the keyboard, you
-use the minibuffer. It will show the most recently added regular
-expression; use @kbd{M-p} to show the next older expression and
address@hidden to select the next newer expression. (You can also type the
-expression by hand, with completion.) When the expression you want to
-unhighlight appears in the minibuffer, press @address@hidden to exit
-the minibuffer and unhighlight it.
-
address@hidden C-x w l @var{regexp} @key{RET} @var{face} @key{RET}
address@hidden C-x w l
address@hidden highlight-lines-matching-regexp
address@hidden lines, highlighting
address@hidden highlighting lines of text
-Highlight entire lines containing a match for @var{regexp}, using face
address@hidden (@code{highlight-lines-matching-regexp}).
-
address@hidden C-x w b
address@hidden C-x w b
address@hidden hi-lock-write-interactive-patterns
-Insert all the current highlighting regexp/face pairs into the buffer
-at point, with comment delimiters to prevent them from changing your
-program. (This key binding runs the
address@hidden command.)
-
-These patterns are extracted from the comments, if appropriate, if you
-invoke @kbd{M-x hi-lock-find-patterns}, or if you visit the file while
-Hi Lock mode is enabled (since that runs @code{hi-lock-find-patterns}).
-
address@hidden C-x w i
address@hidden C-x w i
address@hidden hi-lock-find-patterns
-Extract regexp/face pairs from comments in the current buffer
-(@code{hi-lock-find-patterns}). Thus, you can enter patterns
-interactively with @code{highlight-regexp}, store them into the file
-with @code{hi-lock-write-interactive-patterns}, edit them (perhaps
-including different faces for different parenthesized parts of the
-match), and finally use this command (@code{hi-lock-find-patterns}) to
-have Hi Lock highlight the edited patterns.
-
address@hidden hi-lock-file-patterns-policy
-The variable @code{hi-lock-file-patterns-policy} controls whether Hi
-Lock mode should automatically extract and highlight patterns found in
-a file when it is visited. Its value can be @code{nil} (never
-highlight), @code{t} (highlight the patterns), @code{ask} (query the
-user), or a function. If it is a function,
address@hidden calls it with the patterns as argument;
-if the function returns address@hidden, the patterns are used. The
-default is @code{nil}. Note that patterns are always highlighted if
-you call @code{hi-lock-find-patterns} directly, regardless of the
-value of this variable.
-
address@hidden hi-lock-exclude-modes
-Also, @code{hi-lock-find-patterns} does nothing if the current major
-mode's symbol is a member of the list @code{hi-lock-exclude-modes}.
address@hidden table
-
address@hidden Fringes
address@hidden Window Fringes
address@hidden fringes
-
- On a graphical display, each Emacs window normally has narrow
address@hidden 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 can also indicate other things, such as empty lines, or where a
-program you are debugging is executing (@pxref{Debuggers}).
-
address@hidden set-fringe-style
address@hidden fringe-mode
- You can enable and disable the fringes for all frames using
address@hidden fringe-mode}. To enable and disable the fringes
-for the selected frame, use @kbd{M-x set-fringe-style}.
-
address@hidden Displaying Boundaries
address@hidden Displaying Boundaries
-
address@hidden indicate-buffer-boundaries
- On a graphical display, Emacs can indicate the buffer boundaries in
-the fringes. It indicates the first line and the last line with
-angle images in the fringes. This can be combined with up and down
-arrow images which say whether it is possible to scroll the window up
-and down.
-
- The buffer-local variable @code{indicate-buffer-boundaries} controls
-how the buffer boundaries and window scrolling is indicated in the
-fringes. If the value is @code{left} or @code{right}, both angle and
-arrow bitmaps are displayed in the left or right fringe, respectively.
-
- If value is an alist, each element @code{(@var{indicator} .
address@hidden)} specifies the position of one of the indicators.
-The @var{indicator} must be one of @code{top}, @code{bottom},
address@hidden, @code{down}, or @code{t} which specifies the default
-position for the indicators not present in the alist.
-The @var{position} is one of @code{left}, @code{right}, or @code{nil}
-which specifies not to show this indicator.
-
- For example, @code{((top . left) (t . right))} places the top angle
-bitmap in left fringe, the bottom angle bitmap in right fringe, and
-both arrow bitmaps in right fringe. To show just the angle bitmaps in
-the left fringe, but no arrow bitmaps, use @code{((top . left)
-(bottom . left))}.
-
address@hidden default-indicate-buffer-boundaries
- The value of the variable @code{default-indicate-buffer-boundaries}
-is the default value for @code{indicate-buffer-boundaries} in buffers
-that do not override it.
-
address@hidden Useless Whitespace
address@hidden Useless Whitespace
-
address@hidden trailing whitespace
address@hidden whitespace, trailing
address@hidden 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. It can also be a nuisance
-that the line has ``changed,'' when the change is just spaces added or
-removed at the end.
-
- You can make trailing whitespace at the end of a line visible on the
-screen by setting the buffer-local variable
address@hidden 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.
-
address@hidden 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.)
-
address@hidden indicate-empty-lines
address@hidden default-indicate-empty-lines
address@hidden unused lines
address@hidden 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
address@hidden to a address@hidden value. The default
-value of this variable is controlled by the variable
address@hidden; by setting that variable, you
-can enable or disable this feature for all new buffers. (This feature
-currently doesn't work on text-only terminals.)
-
address@hidden Selective Display
address@hidden Selective Display
address@hidden selective display
address@hidden set-selective-display
address@hidden C-x $
-
- Emacs has the ability to hide lines indented more than a certain number
-of columns (you specify how many columns). You can use this to get an
-overview of a part of a program.
-
- To hide lines in the current buffer, type @kbd{C-x $}
-(@code{set-selective-display}) with a numeric argument @var{n}. Then
-lines with at least @var{n} columns of indentation disappear from the
-screen. The only indication of their presence is that three dots
-(@address@hidden) appear at the end of each visible line that is
-followed by one or more hidden ones.
-
- The commands @kbd{C-n} and @kbd{C-p} move across the hidden lines as
-if they were not there.
-
- The hidden lines are still present in the buffer, and most editing
-commands see them as usual, so you may find point in the middle of the
-hidden text. When this happens, the cursor appears at the end of the
-previous line, after the three dots. If point is at the end of the
-visible line, before the newline that ends it, the cursor appears before
-the three dots.
-
- To make all lines visible again, type @kbd{C-x $} with no argument.
-
address@hidden selective-display-ellipses
- If you set the variable @code{selective-display-ellipses} to
address@hidden, the three dots do not appear at the end of a line that
-precedes hidden lines. Then there is no visible indication of the
-hidden lines. This variable becomes local automatically when set.
-
- See also @ref{Outline Mode} for another way to hide part of
-the text in a buffer.
-
address@hidden Optional Mode Line
address@hidden Optional Mode Line Features
-
address@hidden buffer size display
address@hidden display of buffer size
address@hidden size-indication-mode
- The buffer percentage @var{pos} indicates the percentage of the
-buffer above the top of the window. You can additionally display the
-size of the buffer by typing @kbd{M-x size-indication-mode} to turn on
-Size Indication mode. The size will be displayed immediately
-following the buffer percentage like this:
-
address@hidden
address@hidden of @var{SIZE}
address@hidden example
-
address@hidden
-Here @var{SIZE} is the human readable representation of the number of
-characters in the buffer, which means that @samp{k} for 10^3, @samp{M}
-for 10^6, @samp{G} for 10^9, etc., are used to abbreviate.
-
address@hidden narrowing, and buffer size display
- If you have narrowed the buffer (@pxref{Narrowing}), the size of the
-accessible part of the buffer is shown.
-
address@hidden line number display
address@hidden display of line number
address@hidden line-number-mode
- The current line number of point appears in the mode line when Line
-Number mode is enabled. Use the command @kbd{M-x line-number-mode} to
-turn this mode on and off; normally it is on. The line number appears
-after the buffer percentage @var{pos}, with the letter @samp{L} to
-indicate what it is.
-
address@hidden Column Number mode
address@hidden mode, Column Number
address@hidden column-number-mode
- Similarly, you can display the current column number by turning on
-Column number mode with @kbd{M-x column-number-mode}. The column
-number is indicated by the letter @samp{C}. However, when both of
-these modes are enabled, the line and column numbers are displayed in
-parentheses, the line number first, rather than with @samp{L} and
address@hidden For example: @samp{(561,2)}. @xref{Minor Modes}, for more
-information about minor modes and about how to use these commands.
-
address@hidden 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.
-Thus, it isn't suitable as an argument to @code{goto-line}. (Use
address@hidden command to see the line number relative to the whole
-file.)
-
address@hidden line-number-display-limit
- If the buffer is very large (larger than the value of
address@hidden), 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.
-
address@hidden 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
address@hidden The default value is 200
-characters.
-
address@hidden display-time
address@hidden time (on mode line)
- Emacs can optionally display the time and system load in all mode
-lines. To enable this feature, type @kbd{M-x display-time} or customize
-the option @code{display-time-mode}. The information added to the mode
-line usually appears after the buffer name, before the mode names and
-their parentheses. It looks like this:
-
address@hidden
address@hidden:@var{mm}pm @var{l.ll}
address@hidden example
-
address@hidden
address@hidden display-time-24hr-format
-Here @var{hh} and @var{mm} are the hour and minute, followed always by
address@hidden or @samp{pm}. @var{l.ll} is the average number of running
-processes in the whole system recently. (Some fields may be missing if
-your operating system cannot support them.) If you prefer time display
-in 24-hour format, set the variable @code{display-time-24hr-format}
-to @code{t}.
-
address@hidden mail (on mode line)
address@hidden display-time-use-mail-icon
address@hidden display-time-mail-face
address@hidden display-time-mail-file
address@hidden 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
address@hidden; this may save some space on the mode
-line. You can customize @code{display-time-mail-face} to make the mail
-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'').
-
address@hidden mode line, 3D appearance
address@hidden attributes of mode line, changing
address@hidden non-integral number of lines in a window
- 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
address@hidden face. @xref{Face Customization}.
-
address@hidden 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.
-
address@hidden mode-line-in-non-selected-windows
- You can disable use of @code{mode-line-inactive} by setting variable
address@hidden to @code{nil}; then all mode
-lines are displayed in the @code{mode-line} face.
-
address@hidden eol-mnemonic-unix
address@hidden eol-mnemonic-dos
address@hidden eol-mnemonic-mac
address@hidden eol-mnemonic-undecided
- You can customize the mode line display for each of the end-of-line
-formats by setting each of the variables @code{eol-mnemonic-unix},
address@hidden, @code{eol-mnemonic-mac}, and
address@hidden to the strings you prefer.
-
address@hidden Text Display
address@hidden How Text Is Displayed
address@hidden characters (in text)
-
- @acronym{ASCII} printing characters (octal codes 040 through 0176) in Emacs
-buffers are displayed with their graphics, as are non-ASCII multibyte
-printing characters (octal codes above 0400).
-
- Some @acronym{ASCII} control characters are displayed in special ways. The
-newline character (octal code 012) is displayed by starting a new line.
-The tab character (octal code 011) is displayed by moving to the next
-tab stop column (normally every 8 columns).
-
- Other @acronym{ASCII} control characters are normally displayed as a caret
-(@samp{^}) followed by the non-control version of the character; thus,
-control-A is displayed as @samp{^A}. The caret appears in face
address@hidden
-
- address@hidden characters 0200 through 0237 (octal) are
-displayed with octal escape sequences; thus, character code 0230
-(octal) is displayed as @samp{\230}. The backslash appears in face
address@hidden
-
address@hidden ctl-arrow
- If the variable @code{ctl-arrow} is @code{nil}, 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
-default is initially @code{t}.
-
- 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 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{Unibyte Mode}.
-
address@hidden nobreak-char-display
address@hidden no-break space, display
address@hidden no-break hyphen, display
address@hidden soft hyphen, display
- Some character sets define ``no-break'' versions of the space and
-hyphen characters, which are used where a line should not be broken.
-Emacs normally displays these characters with special faces
-(respectively, @code{nobreak-space} and @code{escape-glyph}) to
-distinguish them from ordinary spaces and hyphens. You can turn off
-this feature by setting the variable @code{nobreak-char-display} to
address@hidden If you set the variable to any other value, that means to
-prefix these characters with an escape character.
-
address@hidden tab-width
address@hidden default-tab-width
- Normally, a tab character in the buffer is displayed as whitespace which
-extends to the next display tab stop position, and display tab stops come
-at intervals equal to eight spaces. The number of spaces per tab is
-controlled by the variable @code{tab-width}, which is made local by
-changing it. Note that how the tab character
-in the buffer is displayed has nothing to do with the definition of
address@hidden as a command. The variable @code{tab-width} must have an
-integer value between 1 and 1000, inclusive. The variable
address@hidden controls the default value of this variable
-for buffers where you have not set it locally.
-
- You can customize the way any particular character code is displayed
-by means of a display table. @xref{Display Tables,, Display Tables,
-elisp, The Emacs Lisp Reference Manual}.
-
address@hidden Cursor Display
address@hidden Displaying the Cursor
-
address@hidden blink-cursor-mode
address@hidden blink-cursor-alist
address@hidden cursor, locating visually
address@hidden cursor, blinking
- You can customize the cursor's color, and whether it blinks, using
-the @code{cursor} Custom group (@pxref{Easy Customization}). On
-a graphical display, 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}.
-
address@hidden visible-cursor
- Some text terminals offer two different cursors: the normal cursor
-and the very visible cursor, where the latter may be e.g. bigger or
-blinking. By default Emacs uses the very visible cursor, and switches
-to it when you start or resume Emacs. If the variable
address@hidden is @code{nil} when Emacs starts or resumes, it
-doesn't switch, so it uses the normal cursor.
-
address@hidden cursor in non-selected windows
address@hidden 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 variable @code{cursor-in-non-selected-windows} and assign
-it a @code{nil} value.
-
address@hidden x-stretch-cursor
address@hidden wide block cursor
- On graphical displays, 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
address@hidden to a address@hidden value.
-
address@hidden hl-line-mode
address@hidden global-hl-line-mode
address@hidden highlight current line
- To make the cursor even more visible, you can use 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.
-
address@hidden Line Truncation
address@hidden Truncation of Lines
-
address@hidden truncation
address@hidden line truncation, and fringes
- As an alternative to continuation, Emacs can display long lines by
address@hidden This means that all the characters that do not fit
-in the width of the screen or window do not appear at all. On
-graphical displays, a small straight arrow in the fringe indicates
-truncation at either end of the line. On text-only terminals, @samp{$}
-appears in the first column when there is text truncated to the left,
-and in the last column when there is text truncated to the right.
-
address@hidden truncate-lines
address@hidden toggle-truncate-lines
- Horizontal scrolling automatically causes line truncation
-(@pxref{Horizontal Scrolling}). You can explicitly enable line
-truncation for a particular buffer with the command @kbd{M-x
-toggle-truncate-lines}. This works by locally changing the variable
address@hidden If that variable is address@hidden, long lines
-are truncated; if it is @code{nil}, they are continued onto multiple
-screen lines. Setting the variable @code{truncate-lines} in any way
-makes it local to the current buffer; until that time, the default
-value is in effect. The default value is normally @code{nil}.
-
address@hidden @vindex truncate-partial-width-windows @c Idx entry is in Split
Windows.
- If the variable @code{truncate-partial-width-windows} is
address@hidden, it forces truncation rather than continuation in any
-window less than the full width of the screen or frame, regardless of
-the value of @code{truncate-lines}. For information about side-by-side
-windows, see @ref{Split Window}. See also @ref{Display,, Display,
-elisp, The Emacs Lisp Reference Manual}.
-
address@hidden overflow-newline-into-fringe
- If the variable @code{overflow-newline-into-fringe} is
address@hidden on a graphical display, then Emacs does not continue or
-truncate a line which is exactly as wide as the window. Instead, the
-newline overflows into the right fringe, and the cursor appears in the
-fringe when positioned on that newline.
-
address@hidden Display Custom
address@hidden Customization of Display
-
- This section describes variables (@pxref{Variables}) that you can
-change to customize how Emacs displays. Beginning users can skip
-it.
address@hidden the reason for that pxref is because an xref early in the
address@hidden ``echo area'' section leads here.
-
address@hidden inverse-video
- If the variable @code{inverse-video} is address@hidden, Emacs attempts
-to invert all the lines of the display from what they normally are.
-
address@hidden visible-bell
- If the variable @code{visible-bell} is address@hidden, Emacs attempts
-to make the whole screen blink when it would normally make an audible bell
-sound. This variable has no effect if your terminal does not have a way
-to make the screen blink.
-
address@hidden echo-keystrokes
- The variable @code{echo-keystrokes} controls the echoing of multi-character
-keys; its value is the number of seconds of pause required to cause echoing
-to start, or zero, meaning don't echo at all. The value takes effect when
-there is someting to echo. @xref{Echo Area}.
-
address@hidden baud-rate
- The variable @address@hidden holds the output
-speed of the terminal, as far as Emacs knows. Setting this variable
-does not change the speed of actual data transmission, but the value
-is used for calculations. On text-only terminals, it affects padding,
-and decisions about whether to scroll part of the screen or redraw it
-instead. It also affects the behavior of incremental search.
-
- On graphical displays, @code{baud-rate} is only used to determine
-how frequently to look for pending input during display updating. A
-higher value of @code{baud-rate} means that check for pending input
-will be done less frequently.
-
address@hidden hourglass pointer display
address@hidden hourglass-delay
- On graphical display, Emacs can optionally display the mouse pointer
-in a special shape to say that Emacs is busy. To turn this feature on
-or off, customize the group @code{cursor}. You can also control the
-amount of time Emacs must remain busy before the busy indicator is
-displayed, by setting the variable @code{hourglass-delay}.
-
address@hidden overline-margin
- On graphical display, this variables specifies the vertical position
-of an overline above the text, including the height of the overline
-itself (1 pixel). The default value is 2 pixels.
-
address@hidden x-underline-at-descent-line
- On graphical display, Emacs normally draws an underline at the
-baseline level of the font. If @code{x-underline-at-descent-line} is
address@hidden, Emacs draws the underline at the same height as the
-font's descent line.
-
address@hidden 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
address@hidden with a address@hidden
-argument to suppress the effect of bold-face in this case.
-
address@hidden no-redraw-on-reenter
- On a text-only terminal, when you reenter Emacs after suspending, Emacs
-normally clears the screen and redraws the entire display. On some
-terminals with more than one page of memory, it is possible to arrange
-the termcap entry so that the @samp{ti} and @samp{te} strings (output
-to the terminal when Emacs is entered and exited, respectively) switch
-between pages of memory so as to use one page for Emacs and another
-page for other output. On such terminals, you might want to set the variable
address@hidden address@hidden; this tells Emacs to
-assume, when resumed, that the screen page it is using still contains
-what Emacs last wrote there.
-
address@hidden
- arch-tag: 2219f910-2ff0-4521-b059-1bd231a536c4
address@hidden ignore