xdvi
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NAME
xdvi - DVI Previewer for the X Window System
SYNOPSIS
xdvi [+[page]] [-s shrink] [-S density] [-p pixels] [-l]
[-paper papertype] [-mgs[n] size] [-altfont font] [-margins
inches] [-sidemargin inches] [-topmargin inches] [-rv] [-fg
color] [-bg color] [-hl color] [-bd color] [-cr color] [-bw
width] [-geometry geometry] [-icongeometry geometry] [-
iconic] [-display display] [-copy] [-thorough] dvi_file
DESCRIPTION
Xdvi is a program which runs under the X window system. It
is used to preview DVI files, such as are produced by TeX.
This program has the capability of showing the file shrunken
by various (integer) factors, and also has a ``magnifying
glass'' which allows one to see a small part of the unshrunk
image momentarily.
Before displaying any page or part thereof, it checks to see
if the dvi file has changed since the last time it was
displayed. If this is the case, then xdvi will reinitialize
itself for the new dvi file. For this reason, exposing
parts of the xdvi window while TeX is running should be
avoided. This feature allows you to preview many versions
of the same file while running xdvi only once.
In addition to using keystrokes to move within the file,
xdvi provides buttons on the right side of the window, which
are synonymous with various sequences of keystrokes.
OPTIONS
In addition to specifying the .dvi file (with or without the
.dvi), Xdvi supports the following command line options. If
the option begins with a `+' instead of a `-', the option is
restored to its default value. By default, these options
can be set via the resource names given in parentheses in
the description of each option.
+page
Specifies the first page to show. If + is given
without a number, the last page is assumed; the first
page is the default.
-s shrink
(.shrinkFactor) Defines the initial shrink factor. The
default value is 3.
-S density
(.densityPercent) Determines the density used when
shrinking bitmaps for fonts. A higher value produces a
lighter font. The default value is 40.
-density density
Same as -S.
-p pixels
(.pixelsPerInch) Defines the size of the fonts to use,
in pixels per inch. The default value is 300.
-altfont font
(.altFont) Declares a default font to use when the font
in the dvi file cannot be found. This is useful, for
example, with PostScript fonts.
-l (.listFonts) Causes the names of the fonts used to be
listed.
-rv (.reverseVideo) Causes the page to be displayed with
white characters on a black background, instead of vice
versa.
-bw width
(.borderWidth) Specifies the width of the border of the
window.
-borderwidth width
Same as -bw.
-fg color
(.foreground) Determines the color of the text (fore-
ground).
-foreground color
Same as -fg.
-bg color
(.background) Determines the color of the background.
-background color
Same as -bg.
-hl color
(.highlight) Determines the color of the page border.
The default is the foreground color.
-bd color
(.borderColor) Determines the color of the window bord-
er.
-bordercolor color
Same as -bd.
-cr color
(.cursorColor) Determines the color of the cursor. The
default is the color of the page border.
-thorough
(.thorough) Xdvi will usually try to ensure that over-
strike characters (e.g. \notin) are printed correctly.
On monochrome displays, this is always possible with
one logical operation, either and or or. On color
displays, however, this may take two operations, one to
set the appropriate bits and one to clear other bits.
If this is the case, then by default xdvi will instead
use the copy operation, which does not handle over-
striking correctly. The ``thorough'' option chooses
the slower but more correct choice. See also -copy,
below.
-copy
(.copy) Always use the copy operation when writing
characters to the display. This option may be neces-
sary for correct operation on a color display, but
overstrike characters will be incorrect.
-margins inches
(.margins) Specifies the size of both the top margin
and side margin. This can be a decimal number, e.g.,
1.5. It determines the ``home'' position of the page
within the window as follows. If the entire page fits
in the window, then the margin settings are ignored.
If, even after removing the margins from the left,
right, top, and bottom, the page still cannot fit in
the window, then the page is put in the window such
that the top and left margins are hidden, and presum-
ably the upper left-hand corner of the text on the page
will be in the upper left-hand corner of the window.
Otherwise, the text is centered in the window. See
also `M' under the KEYSTROKES section.
-sidemargin inches
(.sideMargin) Specifies the side margin (see above).
-topmargin inches
(.topMargin) Specifies the top and bottom margins (see
above).
-paper papertype
(.paper) Specifies the size of the printed page. This
may be of the form wxh (or wxhcm), where w is the width
in inches (or cm) and h is the height in inches (or
cm), respectively. There are also synonyms which may
be used: us (8.5x11), usr (11x8.5), legal (8.5x14),
foolscap (13.5x17), as well as the ISO sizes a1-a7,
b1-b7, c1-c7, a1r-a7r (a1-a7 rotated), etc. The de-
fault size is 8.5 x 11 inches.
-mgs[n] size
(.magnifierSize[n]) Specifies the size of the window to
be used for the ``magnifying glass'' for Button n. See
the MOUSE ACTIONS section. Defaults are 200, 350, 600,
900, and 1200.
-mgs size
Same as -mgs1.
-geometry geometry
(*geometry) Specifies the initial geometry of the win-
dow.
-icongeometry geometry
(.iconGeometry) Specifies the initial position for the
icon.
-iconic
(.iconic) Causes the XDVI window to start in the iconic
state. The default is to start with the window open.
-display host:display
Specifies the host and screen to be used for displaying
the dvi file. This is normally obtained from the en-
vironment variable ``DISPLAY.''
KEYSTROKES
Xdvi recognizes the following keystrokes when typed in its
window. Each may optionally be preceded by a (positive or
negative) number, whose interpretation will depend on the
particular keystroke.
q Quits the program. Control-C and control-D will do
this, too.
n Moves to the next page (or to the nth next page if a
number is given). Synonyms are `f', Space, Return, and
Line Feed.
p Moves to the previous page (or back n pages). Synonyms
are `b', control-H, and Delete.
g Moves to the page with the given number. Initially,
the first page is assumed to be page number 1, but this
can be changed with the `P' keystroke, below. If no
page number is given, then it goes to the last page.
P ``This is page number n.'' This can be used to make
the `g' keystroke refer to actual page numbers instead
of absolute page numbers.
Control-L
Redisplays the current page.
^ Move to the ``home'' position of the page. This is
normally the upper left-hand corner of the page,
depending on the margins as described in the -margins
option, above.
u Moves up two thirds of a window-full.
d Moves down two thirds of a window-full.
l Moves left two thirds of a window-full.
r Moves right two thirds of a window-full.
c Moves the page so that the point currently beneath the
cursor is moved to the middle of the window. It also
(gasp!) warps the cursor to the same place.
M Sets the margins so that the point currently under the
cursor is the upper left-hand corner of the text in the
page. Note that this command itself does not move the
image at all. For details on how the margins are used,
see the -margins option.
s Changes the shrink factor to the given number. If no
number is given, the smallest factor that makes the en-
tire page fit in the window will be used. (Margins are
ignored in this computation.)
S Sets the density factor to be used when shrinking bit-
maps. This should be a number between 0 and 100;
higher numbers produce lighter characters.
R Forces the dvi file to be reread. This allows you to
preview many versions of the same file while running
xdvi only once.
k Normally when xdvi switches pages it moves to the home
position as well. The `k' keystroke toggles a `keep-
position' flag which, when set, will keep the same po-
sition when moving between pages. Also `0k' and `1k'
clear and set this flag, respectively.
MOUSE ACTIONS
If the shrink factor is set to any number other than one,
then clicking any mouse button will pop up a ``magnifying
glass'' which shows the unshrunk image in the vicinity of
the mouse click. This subwindow disappears when the mouse
button is released. Different mouse buttons produce dif-
ferent sized windows, as indicated by the -mgs option. Mov-
ing the cursor while holding the button down will move the
magnifying glass.
Also, the scrollbars (if present) behave in the standard
way: pushing Button 2 in a scrollbar moves the top or left
edge of the scrollbar to that point and optionally drags it;
pushing Button 1 moves the image up or right by an amount
equal to the distance from the button press to the upper
left-hand corner of the window; pushing Button 3 moves the
image down or left by the same amount.
ENVIRONMENT
Uses the environment variable ``DISPLAY'' to specify which
bit map display terminal to use.
The environment variable ``XDVIFONTS'' determines the
path(s) searched for fonts in the following manner. The
string consists of one or more strings separated by colons.
In each such string, the substring ``%f'' is changed to the
font name; ``%d'' is changed to the magnification; and
``%p'' is changed to the font family (``gf'', ``pk'', or
``pxl''). If no ``%f'' appears in the string, then the
string ``/%f.%d%p'' is added on the end. For example, if
the string is ``/usr/local/tex/fonts'' and the font is cmr10
at 300dpi, then it searches for
/usr/local/tex/fonts/cmr10.300gf,
/usr/local/tex/fonts/cmr10.300pk, and
/usr/local/tex/fonts/cmr10.1500pxl, in that order. If the
first character of the ``XDVIFONTS'' variable is a colon,
then the system default paths are tried first. If the font
is not found in the desired size, then xdvi will try to find
the nearest size. If the font cannot be found at all, then
xdvi will try to vary the point size of the font (within a
certain range), and if this fails, then it will use the font
specified as the alternate font (cf. -altfont).
The ``XDVISIZES'' variable must be set to indicate which
sizes of fonts are available. It should consists of a list
of numbers separated by colons. If the list begins with a
colon, the system default sizes are used, as well. Sizes
are expressed in dots per inch; decimals may be used for
``pxl'' files: for example, a 300 dots per inch file magni-
fied by half a step comes out to 1643 dots per five inches,
which should be encoded as 328.6. The current default set
of sizes is 300:328.6:360:432:518.4:622:746.4.
FILES
/usr/lpp/tex/fonts/4216 Font pixel files.
SEE ALSO
X(1).
AUTHORS
Eric Cooper, CMU, did a version for direct output to a QVSS.
Modified for X by Bob Scheifler, MIT Laboratory for Computer
Science. Modified for X11 by Mark Eichin, MIT SIPB. Addi-
tional enhancements by many others.