Manual: xev

XEV(1)						   General Commands Manual					      XEV(1)

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 win‐
	       dow.

       -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 win‐
	       dows. 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 visi‐
	       bility 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

AUTHOR
       Jim Fulton, MIT X Consortium

X Version 11						  xev 1.2.6						      XEV(1)