@c This is part of the Emacs manual.
-@c Copyright (C) 1985, 1986, 1987, 1993, 1994, 1995, 1997, 2000, 2001,
-@c 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011
+@c Copyright (C) 1985-1987, 1993-1995, 1997, 2000-2011
@c Free Software Foundation, Inc.
@c See file emacs.texi for copying conditions.
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), Emacs scrolls the text just far enough to bring point back on
-screen. By default, @code{scroll-conservatively} is@tie{}0.
+screen. By default, @code{scroll-conservatively} is@tie{}0. If you
+set @code{scroll-conservatively} to a large number (larger than 100),
+Emacs will never center point as result of scrolling, even if point
+moves far away from the text previously displayed in the window. With
+such a large value, Emacs will always scroll text just enough for
+bringing point into view, so point will end up at the top or bottom of
+the window, depending on the scroll direction.
+
+@vindex scroll-step
+ The variable @code{scroll-step} determines how many lines to scroll
+the window when point moves off the screen. If moving by that number
+of lines fails to bring point back into view, point is centered
+instead. The default value is zero, which causes point to always be
+centered after scrolling.
@cindex aggressive scrolling
@vindex scroll-up-aggressively
far point should be placed from the top of the window; thus, as with
@code{scroll-up-aggressively}, a larger value is more aggressive.
+ These two variables are ignored if either @code{scroll-step} or
+@code{scroll-conservatively} are set to a non-zero value.
+
@vindex 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
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.''
+last, indicating that ``this is not the real end.'' If the line's
+direction is right-to-left (@pxref{Bidirectional Editing}), the
+meaning of the curving arrows in the left and right fringes are
+swapped.
The fringes indicate line truncation with short horizontal arrows
meaning ``there's more text on this line which is scrolled
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:
+line looks like this:
@example
@var{hh}:@var{mm}pm @var{l.ll}
by means of a display table. @xref{Display Tables,, Display Tables,
elisp, The Emacs Lisp Reference Manual}.
+@cindex glyphless characters
+@cindex characters with no font glyphs
+ On graphics displays, some characters could have no glyphs in any of
+the fonts available to Emacs. On text terminals, some characters
+could be impossible to encode with the terminal coding system
+(@pxref{Terminal Coding}). Emacs can display such @dfn{glyphless}
+characters using one of the following methods:
+
+@table @code
+@item zero-width
+Don't display the character.
+
+@item thin-space
+Display a thin space, 1-pixel wide on graphics displays or 1-character
+wide on text terminals.
+
+@item empty-box
+Display an empty box.
+
+@item acronym
+Display the acronym of the character's name (such as @sc{zwnj} or
+@sc{rlm}) in a box.
+
+@item hex-code
+Display the Unicode codepoint of the character in hexadecimal
+notation, in a box.
+@end table
+
+@noindent
+@cindex @code{glyphless-char} face
+With the exception of @code{zero-width}, all other methods draw these
+characters in a special face @code{glyphless-char}, which you can
+customize.
+
+@vindex glyphless-char-display-control
+@vindex char-acronym-table
+To control what glyphless characters are displayed using which method,
+customize the variable @code{glyphless-char-display-control}; see its
+doc string for the details. For even finer control, set the elements
+of 2 char-tables: @code{glyphless-char-display} and
+@code{char-acronym-table}.
+
@node Cursor Display
@section Displaying the Cursor
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{$} appears in the first column when there is text
-truncated to the left, and in the last column when there is text
+terminals, @samp{$} appears in the leftmost column when there is text
+truncated to the left, and in the rightmost column when there is text
truncated to the right.
@vindex truncate-lines
@code{no-redraw-on-reenter} non-@code{nil}; this tells Emacs to
assume, when resumed, that the screen page it is using still contains
what Emacs last wrote there.
-
-@ignore
- arch-tag: 2219f910-2ff0-4521-b059-1bd231a536c4
-@end ignore