Creating a Circuit Port

  1. Select the first edge to create the port. 
    As you hover over, a large yellow arrow appears. This shows the direction towards the next allowable edge.
  2. Alt-select if you want to choose a different second edge.
  3. Press Enter.
    An electromagnetic region is created. See the physics tree for more details.  The edges must lie in the same Cartesian plane. The face in between the edges can lie on the boundary of two bodies, or it can cut through an unrelated solid. However, it cannot lie along or cut through a conductor.