To enter the Connection Mode, select "Logic/Connection Mode" from the menu or simply press the corresponding button of the toolbar. You can use the following operations:
Click&hold on an empty place on the screen will create new wires.
Click&hold at the end of a wire will create new nodes for this wire.
Drag wire on the LEFT SIDE of a device will connect device-INPUT and wire
Drag wire on the RIGHT SIDE of a device will connect device-OUTPUT and wire
You can also move devices in this mode as usual.
To erase parts of a wire press the right mouse button on any node.
If you press the right mouse button on a device, a menu with possible functions appears (see Device section.