A core editing function is adding new places and transitions to a net. This can be done by dragging and dropping the following symbols from the toolbar to the area for editing.
Furthermore, it is possible to draw arcs in order to connect one or more places with one or more transitions. Dragging and dropping the mouse from the middle of an element when it is surrounded with a green line allows the user to draw an arc directed to the counterpart of its source element. If no target element exists, it is feasible to just drag and drop an arc from a source. A new place or transition will be created respectively.
It is possible to just pull the arc to a diff erent place or transition, in the case that the
source or target node needs to be changed. The next chapter explains various special
functions of a P/T-Net.