From Game Editor
Actors are controlled by triggers implemented by the maker, allowing for a wide range of actions while still be easy to use. Most actors will be comprised of many events, with designated reactions. To add an event trigger for an actor, go to the Actor Control, and click on the Add button by Events:. This will give you a list of the following possible events.
After selecting the desired trigger event, you can then choose the reaction, Functions. A lot of users will create several duplicate events just to create different actions. This can be accomplished with just one event, and use of the Script Editor, as all actions are available in script.