xwininfo - window information utility for X
xwininfo [-help] [-id wdid] [-root] [-name wdname] [-int]
  [-children] [-tree] [-stats] [-bits] [-events] [-size] [-wm] [-shape] [-frame]
  [-all] [-english] [-metric] [-display host:dpy] [-version]
Xwininfo is a utility for displaying information about windows. Various
  information is displayed depending on which options are selected. If no
  options are chosen, -stats is assumed.
The user has the option of selecting the target window with the
    mouse (by clicking any mouse button in the desired window) or by specifying
    its window id on the command line with the -id option. Or instead of
    specifying the window by its id number, the -name option may be used
    to specify which window is desired by name. There is also a special
    -root option to quickly obtain information on the screen's root
    window.
  - -help
- Print out the `Usage:' command syntax summary.
- -id wdid
- This option allows the user to specify a target window wdid on the
      command line rather than using the mouse to select the target window. This
      is very useful in debugging X applications where the target window is not
      mapped to the screen or where the use of the mouse might be impossible or
      interfere with the application.
- -name wdname
- This option allows the user to specify that the window named wdname
      is the target window on the command line rather than using the mouse to
      select the target window.
- -root
- This option specifies that X's root window is the target window. This is
      useful in situations where the root window is completely obscured.
- -int
- This option specifies that all X window ids should be displayed as integer
      values. The default is to display them as hexadecimal values.
- -children
- This option causes the root, parent, and children windows' ids and names
      of the selected window to be displayed.
- -tree
- This option is like -children but displays all children
      recursively.
- -stats
- This option causes the display of various attributes pertaining to the
      location and appearance of the selected window. Information displayed
      includes the location of the window, its width and height, its depth,
      border width, visual id and class, colormap id if any, map state,
      backing-store hint, and location of the corners.
- -bits
- This option causes the display of various attributes pertaining to the
      selected window's raw bits and how the selected window is to be stored.
      Displayed information includes the selected window's bit gravity, window
      gravity, backing-store hint, backing-planes value, backing pixel, and
      whether or not the window has save-under set.
- -events
- This option causes the selected window's event masks to be displayed. Both
      the event mask of events wanted by some client and the event mask of
      events not to propagate are displayed.
- -size
- This option causes the selected window's sizing hints to be displayed.
      Displayed information includes: for both the normal size hints and the
      zoom size hints, the user supplied location if any; the program supplied
      location if any; the user supplied size if any; the program supplied size
      if any; the minimum size if any; the maximum size if any; the resize
      increments if any; and the minimum and maximum aspect ratios if any.
- -wm
- This option causes the selected window's window manager hints to be
      displayed. Information displayed may include whether or not the
      application accepts input, what the window's icon window # and name is,
      where the window's icon should go, and what the window's initial state
      should be.
- -shape
- This option causes the selected window's window and border shape extents
      to be displayed.
- -frame
- This option causes window manager frames to be considered when manually
      selecting windows.
- -metric
- This option causes all individual height, width, and x and y positions to
      be displayed in millimeters as well as number of pixels, based on what the
      server thinks the resolution is. Geometry specifications that are in
      +x+y form are not changed.
- -english
- This option causes all individual height, width, and x and y positions to
      be displayed in inches (and feet, yards, and miles if necessary) as well
      as number of pixels. -metric and -english may both be
      enabled at the same time.
- -all
- This option is a quick way to ask for all information possible.
- -d, -display host:dpy
- This option allows you to specify the server to connect to; see
      X(7).
- -version
- This option indicates that xwininfo should print its version
      information and exit.
The following is a sample summary taken with no options specified:xwininfo: Window id: 0x60000f "xterm"
   Absolute upper-left X: 2
   Absolute upper-left Y: 85
   Relative upper-left X: 0
   Relative upper-left Y: 25
   Width: 579
   Height: 316
   Depth: 8
   Visual: 0x1e
   Visual Class: PseudoColor
   Border width: 0
   Class: InputOutput
   Colormap: 0x27 (installed)
   Bit Gravity State: NorthWestGravity
   Window Gravity State: NorthWestGravity
   Backing Store State: NotUseful
   Save Under State: no
   Map State: IsViewable
   Override Redirect State: no
   Corners: +2+85 -699+85 -699-623 +2-623
   -geometry 80x24+0+58
  - DISPLAY
- To get the default host and display number.
X(7), xprop(1), xdpyinfo(1), xdriinfo(1),
  xvinfo(1), glxinfo(1)
Using -stats -bits shows some redundant information.The -geometry string displayed must make assumptions about
    the window's border width and the behavior of the application and the window
    manager. As a result, the location given is not always correct.
Mark Lillibridge, MIT Project Athena