Introduction to Actions
Actions allow you to add interactivity to your scene without having to write code. An action is short for an interaction: When an event occurs, a behavior (animation) follows. For example when you click on a button and an image appears.
Actions don’t run inside the editor, so that you don’t fight them as you edit the scene. You see your actions when you either preview or export the scene.
Actions in VR
Hardware like Google Cardboard doesn’t have any inputs other than gazing at objects. To solve interactivity in this environment, you use what’s called a fuse cursor (enabled by selecting the Scene in the Object list, and going to the Controls section in the inspector).