How to show message types in rqt_graph?

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Hi,

I am using the rqt_graph for visualizing the ROS computation graph. My doubt is if it exists any way to show on top of the arrows the type of the messages that are use to communicate each pair of nodes. I have tried using rosparam set enable_statistics true but anything changes on the rqt_graph after hit the refresh button.

Other thing, is any way to show the services that are currently being used?

Next, I attached my rqt_graph with the selected options rqt_graph

Thanks for your help!