swipe holding the left mouse button to rotate the model
scroll the mouse wheel to zoom
toggle check boxes to turn on/off model properties
click the shape preview to toggle the model
click the texture preview heading to toggle the texture map
drag images from the file system onto the texture preview to load the image
drag images from other websites onto the texture preview to load the image (limited by the security policy of the source website)
more options are available in the developer console by changing the "settings" object (some changes may require calling "GameLoop.draw()" or "settings.regenModel()")