Insert a One-Line Diagram
You can also insert a one-line diagram onto TCC curve plot by selecting the One-Line check box in the TCC tab. This inserts the one-line diagram of the items plotted onto the TCC plot. You can move the one-line diagram to any location on the TCC plot by clicking anywhere on the box and dragging it to the desired location.
You can format the one-line on the TCC plot by clicking the arrow below 
Format TCC and clicking 
One-line on TCC. You can format the border and the fill color. To save the format as a default setting, click Default.
