The horizontal scale for all graphs is fixed allowing a window of 8 units around the y-axis. The vertical scale, however, is adjustable. Right clicking on a graph will expose a pop-up menu where you can adjust the scale. Choosing ‘Scale’ from the pop-up menu will make a window appear where you can specify auto-scaling or give specific values for the y-min and y-max. Note: changes made to the scale may or may not be affected by a subsequent change in the potential function. It may be necessary to re-specify a custom scale.