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This section contains information for customization only. Beginning users should skip it.
The variable mode-line-inverse-video controls whether the mode
line is displayed in inverse video (assuming the terminal supports it);
nil means don't do so. See section The Mode Line. If you specify the
foreground color for the modeline face, and
mode-line-inverse-video is non-nil, then the default
background color for that face is the usual foreground color.
See section Using Multiple Typefaces.
If the variable inverse-video is non-nil, Emacs attempts
to invert all the lines of the display from what they normally are.
If the variable visible-bell is non-nil, 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.
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 `ti' and `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. Then
you might want to set the variable no-redraw-on-reenter
non-nil; this tells Emacs to assume, when resumed, that the
screen page it is using still contains what Emacs last wrote there.
The variable 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. See section The Echo Area.
If the variable ctl-arrow is nil, control characters in
the buffer are displayed with octal escape sequences, except for newline
and tab. Altering the value of ctl-arrow makes it local to the
current buffer; until that time, the default value is in effect. The
default is initially t. See section `Display Tables' in The Emacs Lisp Reference Manual.
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 tab-width, which is made local by
changing it, just like ctl-arrow. Note that how the tab character
in the buffer is displayed has nothing to do with the definition of
TAB as a command. The variable tab-width must have an
integer value between 1 and 1000, inclusive.
If the variable truncate-lines is non-nil, then each
line of text gets just one screen line for display; if the text line is
too long, display shows only the part that fits. If
truncate-lines is nil, then long text lines display as
more than one screen line, enough to show the whole text of the line.
See section Continuation Lines. Altering the value of truncate-lines
makes it local to the current buffer; until that time, the default value
is in effect. The default is initially nil.
If the variable truncate-partial-width-windows is
non-nil, it forces truncation rather than continuation in any
window less than the full width of the screen or frame, regardless of
the value of truncate-lines. For information about side-by-side
windows, see section Splitting Windows. See also section `Display' in The Emacs Lisp Reference Manual.
The variable baud-rate 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 such as padding. It also affects decisions about whether
to scroll part of the screen or redraw it instead--even when using a
window system. (We designed it this way, despite the fact that a window
system has no true "output speed," to give you a way to tune these
decisions.)
You can customize the way any particular character code is displayed by means of a display table. See section `Display Tables' in The Emacs Lisp Reference Manual.
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