To create a new page (view), you can click the page icon on this toolbar and then click anywhere on the diagram. A New Page Wizard will appear.
To create a transition (rule) connecting pages:
Select the transition icon from the toolbar (2nd from the bottom).
Click the source page.
Click the target page.
A transition will appear between the two pages:
It is also possible to create a new page with context menu by right-clicking anywhere on the diagram and selecting New View.
To edit an existing transition, first select the transition line. Then, place the mouse cursor over the last black dot (on the target page). The mouse cursor will change to a big +. At this point, drag the line to a new target page: