To insert a break in a feeder, go to
DM Electrical
One Line DiagramInsert Break in Wire
Design Master will ask you to pick the point on the feeder where you wish to insert the break. Design Master will center the break on the point where you click. (see below example)
It may be necessary to adjust the ends of the broken feeder to achieve the correct graphical representation of the feeders. See the description of moving feeders for more information.