There are plenty of di erent options, which can be invoked from the menubar. For example, P/T-Nets and CPNs can be built by selecting File->New and choosing the elds P/T-Net or CPN. This way, several individual instances of home-screens can be initialised. Moreover, the user is able to change a variety of properties in Wolfgang by selecting the item Settings->Edit Wolfgang properties… in the menubar. The fields of the following dialog can be edited.
The property window shows plenty of options which are relevant for the layout of the
home-screen and the design of the nets. The menubar in the home-screen also o ers the option to open existing nets. A Dialogue shows up when the user clicks on File-> Open .pnml in new Window.
Subsequently, a P/T-Net or CPN in the standardised .pnml format can be selected. The
chosen net is displayed in a new instance of the home-screen after the user clicked on the button with the caption “load PNML”. Wolfgang is able to save changes of an already as .pnml le existing net by clicking on File!Save in the menubar. There is the option File->Save as… in the case that the user wants to save the modi ed net in a new .pnml fi le. A dialogue comes up where a le name and location needs to be determined.
Afterwards the net can be stored by selecting the button ”save PNML”. A click in the menubar on File->Save provokes the same action as the selection of File->Save as…, if the user wants to store a newly created net, which has not been saved before.
When the user closes an instance of Wolfgang by clicking on File->Exit or through an action of the operating system, two questions come up. The first one asks, if the net should be saved. Then, if the answer is yes, the File->Save as… action is being triggered, otherwise the question disappears. The second questions asks, if the software should quit completely or close just the active instance. A click on the “OK” button terminates the programme.
All functionalities of the home-screen have been introduced in this section.