anchor.diff:  
   ----
   
  -Optionally, place the main camera in the scene and rotate it in its start position. 
  +Optionally, place the main camera in the scene and rotate it in its start position.
   
   [source,java]
   ----
  
positive.code: cam_n.setViewPort(...); // resize the viewPort
  cam_n.setLocation(new Vector3f(...));
  cam_n.setRotation(new Quaternion(...));
          
  ViewPort view_n = renderManager.createMainView("View of camera #n", cam_n);
  view_n.setClearEnabled(true);
  view_n.attachScene(rootNode);
  
negative.code: 
  ----
  
  These viewport parameters are, (in this order) the left-right extend, and the bottom-top extend of a views's rectangle on the screen.
  
  [source]
  ----
  