A computer-implemented method for controlling an electromagnetic energy source is disclosed. Instructions are executed on a processor to display on a computer-human interface display device a user interface region. The user interface region includes a pie-graph. An input is received via the user interface region, where the input is an interaction with the pie-graph that changes one of the radius or a sector of the plurality of the sectors. A power output of one or more of the electromagnetic energy sources is adjusted based on the input.