Type: Bitmap
    Extension: .xwd
      Version: 
  Compression: None
  Color Depth: Unlimited
   Maintainer: X Consortium
Specification: ftp://ftp.x.org/

XWD is used to store screen dumps created by the xwd client process in the
X Window System. The image of any window or the background may be saved
(dumped) to an XWD file. Using the following command:

  xwd -root > bg.xwd

The background is saved to the file bg.xwd. By replacing the "root" flag
with the ID of a window, only that window will be saved to the XWD file.

XWD was created by the X Consortium as part of the X Window System. Refer
to the /usr/include/X11 directory for header files (XWDFile.h) that define
the X10 and X11 versions of the XWD format.  The central FTP distribution
site for X version 11 is:

  ftp://ftp.x.org

Some parts © 2009 Advameg, Inc.