I think what you are asking is how to make it so a button only activates an action or animation once until it finishes. If this is the case, you are looking for the DoOnce node. Connect it to the button press event and then don’t call the Reset on the DoOnce node until after the action or animation is done. The DoOnce node does what it’s name says, it only runs the code once until the Reset pin is activated.
I’m supersized that I can’t find this easily, either that or nobody has asked yet, but I have been try to stop my character from being able to hold down a button to play an animation. I want to make a game where you can use magic powers, swords, etc. but I want the player to press the buttons multiple times in order to play the animation and not let the player hold said button to play the animation. So my question is, how do I stop button holding? This has been the biggest problem I’ve had thus far when game designing in this engine, if anyone can help me that would be AMAZING! Without being able to do this, I may not be able to make any of the games I want to make 
Thank You!
I fixed it in a different way. For anyone else out there who needs help fixing this, I am more than glad to make a screen shot if requested.
Looking for this effect if you could provide that screen shot please 