Once the graph window opens, an image similar to the one above should appear
(different choices for the parameters at the previous step can influence relationships
between nodes).
In order to have a clearer visualization of the links between nodes, it is possible to
choose a different layout. Let's click on the menu Graph and from the submenu Layout let's choose KK Layout. the result of the operation will be similar to the following figure.
It can happen that also with a layout different from the circular one it is not
possible to well distinguish incoming an outgoing arcs from a node. A valid help in
this case is given from the zoom functionality: clicking on Visualization / Zoom, on
the right of the graph a small window will appear, with the commands to enlarge, make smaller or
revert the graph to default size. In addition, in the command window a
preview of the graph is shown in which the graph area interested by the operation is
enclosed in a blue rectangle. By dragging the rectangle the involved region is moved,
and by clicking on the rectangle edges it is possible to resize the zoomed area.
