More control over options

Using node navigation and the dandelion structure, instead of just questions on a page, the case author has much more control over how the user navigates the case. 

There is a 'Prevent Revisit' option for each Node. This can be turned on for a whole dandelion (using a Section in the Visual Editor) so that, as nodes are visited, they drop off the list of remaining options. 

Using the Link arrows, not all Nodes need to be accessible from every other node in the dandelion, so you can therefore control some of the choices between nodes.