The wiring tool can only draw purely horizontal or purely vertical wires. It would be nice if it could do simple L shapes, so that wiring things takes half as many clicks. An L shaped wiring tool also makes so you don't have to guess where to click the bend in the wire. Attached is a patch that changes the wiring tool. Pure horizontal and pure vertical wires work as before. After moving a bit horizontal, if the mouse moves vertical, the tool will create an L shaped wire with the first segment horizontal, and second segment vertical. Or, after starting out vertical, the mouse can move horiztonal to create a L shape with first segment vertical and second horiztonal. Its very intuitive and easy to use. Underneath, the wiring tool is really just adding one or two normal wires as needed, so the rest of the logisim engine doesn't change -- this is purely a UI change.