How do I create a wire junction?

Move the mouse over an existing wire, press ALT and the left mouse button, and drag the mouse to create the new wire.

How do I zoom the view?

Scroll with the mouse wheel.

How do I pan the view?

Press/hold middle mouse button and move the mouse.

How to I create non-orthogonal wires?

First create an orthogonal wire. Then change the wire’s “Layout” property to “None”. Now you can select the wire and move the line segment’s end point.