Pen & Share
Draw on or annotate any chosen screen with the Pen tool, and share views from the app via e-mail, Facebook, Twitter or add an image to iPhoto.
The 3D model can be simply manipulated using finger gestures: spread to zoom in; drag two fingers to pan; pinch to zoom out; and drag to rotate.
Home & Reset
Return the model to its original position on screen with Home, and use Reset to restore all hidden structures on the model.