This editor allows one to build interactive electric circuits. Drag and drop parts from the palette or double click on the background to create a junction.

Drag from the preset ports on the parts to another part's ports to draw wires. Double-click on wires to create a junction on the wire. Hit W to toggle the wire creating tool

Select an element to change its properties based on what part it is. Also the ability to double click switches to change their state, or edit them through data inspector.