NAME

       xev - print contents of X events

SYNOPSIS

       xev      [-display     displayname]     [-geometry     geom]     [-bw     pixels]     [-bs
       {NotUseful,WhenMapped,Always}] [-id windowid] [-root] [-s] [-name string] [-rv] [-version]
       [-event event_mask [-event event_mask ...]]

DESCRIPTION

       Xev  creates  a  window  and  then  asks  the X server to send it events whenever anything
       happens to the window (such as it being moved, resized, typed in, clicked in, etc.).   You
       can  also  attach it to an existing window.  It is useful for seeing what causes events to
       occur and to display the information that they contain; it is essentially a debugging  and
       development tool, and should not be needed in normal usage.

OPTIONS

       -display display
               This option specifies the X server to contact.

       -geometry geom
               This option specifies the size and/or location of the window, if a window is to be
               created.

       -bw pixels
               This option specifies the border width for the window.

       -bs {NotUseful,WhenMapped,Always}
               This option specifies what kind of backing store to give the window.  The  default
               is  NotUseful.  Backing store refers to the the pixels saved off-screen when the X
               server maintains the contents of a window; NotUseful means that  the  xev  process
               will redraw its contents itself, as necessary.

       -id windowid
               This  option  specifies  that  the  window  with the given id should be monitored,
               instead of creating a new window.

       -root   This option specifies that  the  root  window  should  be  monitored,  instead  of
               creating a new window.

       -s      This  option  specifies  that  save-unders  should  be enabled on the window. Save
               unders are similar to backing store, but they refer rather to the saving of pixels
               off-screen  when  the  current window obscures other windows. Save unders are only
               advisory, and are normally set for popup dialogs and other transient windows.

       -name string
               This option specifies the name to assign to the created window.

       -rv     This option specifies that the window should be in reverse video.

       -event event_mask
               Select which events to display.  The -event option can be specified multiple times
               to  select multiple types of events.  When not specified, all events are selected.
               Available event masks: keyboard mouse  expose  visibility  structure  substructure
               focus property colormap owner_grab_button randr button

       -version
               This option prints the program version and exits.

SEE ALSO

       X(7), xwininfo(1), xdpyinfo(1), Xlib Programmers Manual, X Protocol Specification
       See X(7) for a full statement of rights and permissions.

AUTHOR

       Jim Fulton, MIT X Consortium