Buses
The central equipment type of every one-line is the bus. A bus defines the connection point for two or more pieces of equipment. Equipment items which are not yet connected to a bus are highlighted in red.
To add a bus to the one-line, click 
Bus in the Equipment Palette or Insert tab. The pointer changes to the shape of a bus as you move back to the one-line. Click on the location where you want to position the bus. You can continue adding buses in this way until you click on another palette button.
You can lengthen or shorten a bus by dragging one end with the left mouse button. There is a default size when you place a bus on the one-line, but you can also shrink the bus down to a single dot or “node.”
Figure 1: Shrinking Buses to Nodes
