about the rqt_pose_view

hello every one: I am learning to use `rqt_pose_view`, but I get some problem , I just follow this website [wiki.ros.org/rqt_pose_view](http://wiki.ros.org/rqt_pose_view) to test it ,but there is no change with the pose_view showing , then I used the command `rostopic list`, but I find nothing about the pose message . Could anyone tell me how to use the pose_view to show the pose of robot or which topic the is subscribed by the `rqt_pose_view` ? Thanks