xev 1.2.2

xev: unrecognized argument '--help' usage: xev [-options ...] where options include: -display displayname X server to contact -geometry geom size and location of window -bw pixels border width in pixels -bs {NotUseful,WhenMapped,Always} backingstore attribute -id windowid use existing window -root use root window -s set save-unders attribute -name string window name -rv reverse video -event event_mask select 'event_mask' events Supported event masks: keyboard mouse expose visibility structure substructure focus property colormap owner_grab_button randr button This option can be specified multiple times to select multiple event masks.