GV Frequently Asked Questions                                           gv 3.5
== ========== ===== =========

Contents
========

o    What happened to the scroll bars?
o    How can I make even more room for the image?
o    Small characters aren't very clear (eg. compared to xdvi).
o    When the display is obscured (eg. by another window) and then brought
     back into view, the output is not refreshed automatically.
o    Characters are displayed in unreadable reverse-video or as black or
     white rectangles.
o    When I start VMS Ghostscript I get the message "Cannot get Window from
     ghostview" and then Ghostscript exits.


Additional Sources of Information
========== ======= == ===========

o    gv Home Page           http://wwwthep.physik.uni-mainz.de/~plass/gv/
o    Ghostscript Home Page  http://www.cs.wisc.edu/~ghost/index.html
o    gv documentation       http://wwwthep.physik.uni-mainz.de/~plass/gv/gv_doc/gv.html


FAQ
===

What happened to the scroll bars?

     They have been removed in order to make more room for the image. The
     displayed portion of the image may be moved by dragging the image or
     the paner (panel between the "Save Marked" and <<  >> buttons) with the
     mouse. Alternatively, the cursor arrow keys can be used.


How can I make even more room for the image?

     Use the "spartan" style by starting gv with the command

         gv -spartan

     This removes the "Open", "Print", "Save", "Redisplay", and page marking
     buttons (they are still available from the "File" and "Page" menus) and
     replaces them with the document attribute controls, which are normally
     along the top.


Small characters aren't very clear (eg. compared to xdvi).

     Antialiasing can improve the display of bitmapped fonts (eg. from TeX)
     when displayed on a colour or greyscale screen. The same technique is
     used by xdvi. Note that antialiasing requires at least Ghostscript
     version 4.x.

     Antialiasing can be turned on from the "State" menu, and can be made
     default by saving the setting in "State | gv Options...". It is not on by
     default because it's slower.


When the display is obscured (eg. by another window) and then brought back
into view, the output is not refreshed automatically (but the "Refresh" button
does work).

     There are two methods that can be used to save the contents of the
     window when it's not currently displayed: backing store and backing
     pixmap. Some X-servers seem to support only backing store (eg.
     VAXstations) and some only backing pixmap (eg. some X-terminals,
     including EWS).

     In order to force gv to use one method or the other, use the
     "State | Setup Options ..." menu and toggle the "Backing Pixmap" button.
     When selected/highlighted (normally the default), gv will use backing
     pixmap; otherwise it will use backing store. Select "Apply" to use a new
     setting and "Save" to make it the new default.


Characters are displayed in unreadable reverse-video or as black or white
rectangles.

     This occurs on EWS X-terminals, which do not implement bitmap/pixmap
     displaying properly. To fix this you need a Ghostscript resource file
     containing the following line

         Ghostscript*useXPutImage: false

     On Unix, put the above line into a file called ~/Ghostscript .

     On VMS, it should go into GHOSTSCRIPT.DAT, which should be placed in
     your home directory (i.e. where you find yourself immediately after
     logging in) unless you have redefined the logical name
     DECW$USER_DEFAULTS, in which case it should go in the directory
     specified by this logical name.


When I start VMS Ghostscript I get the message "Cannot get Window from
ghostview" and then Ghostscript exits.

     Ghostscript reserves the environment variable GHOSTVIEW (logical name
     or DCL symbol on VMS) for internal use, so it should not be used for
     other purposes (eg. as a VMS command symbol for this program; use GV
     instead).

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Last modified: 10th June 1997 (gv 3.5.3).
Tim Adye, <T.J.Adye@rl.ac.uk>