This preview allows your to see your ARbook content without need any marker, so you can know how it contains without printing markers or activating your webcam. It's also very useful to check how 3d models look and be sure that they load successfully.
Every kind of marker have some controls that you could use to interact with them:
Sound: play / stop.
3D model: vertical movement / zoom.
Video: play / stop.
These actions won't be saved. If you have any problem or doubt, you can check our FAQ or send us a message.