Set/Modify event in blueprint


As you can see on the screen i set severals events.

I am actually creating a settings menu in my program and would like to modify the input key of the events.

For exemple, we can see that the key input of the event “move forward” is “W”. If i pressed the button of my widget settings (check screen), i would to modify the input “W” to the input “Z”.
But i didn’t find how to change the input key of a event …

Help !