There are three modes of operation:
This mode allows the user to insert components (resistors, sources, ground) into the circuit. Use the popup menu to choose the type of component. The Control-R key will rotate a selected component (shown in blue). The popup menu also allows the use of a dialog box to enter the name and value of the component.
This mode allows the user to draw wires. Wires must start at a device node and connect either another device node or an existing wire. Double click on a wire to delete it. You should draw the wires in the order you wish them numbered, although you can renumber them in Nodes mode.
This mode allows the user to review the node numbering, and change the numbering by double-clicking on a set of connected nodal wires.