Thanks, I do know about that, but what I meant was being able to call a method that would dynamically generate the strings when the field is entered and display them in the field's editor in the action (rather than having the strings preset), like the popup for 'FSM Name' in the 'Send Event' action. It's getting a list of FSMs on a gameobject and displaying them. I'd like to be able to do this, but with my own generated lists.