Set Graph Height: This dropdown menu is disabled by default, and therefore allows the scale of the y-axis (vertical axis) of the main chart to be automatically generated according to the overrepresentation of the words listed. Selecting Enabled allows editing of the Step, Step Width, and Start boxes, which in turn permit you to set the scale of y-axis of the main chart manually. The Step box contains the number of major axis lines or demarcations to be noted on the y-axis of the main chart. The Step Width box contains the range of overrepresentation to be found between major axis or demarcation lines. The Start box sets the overrepresentation at which the x-axis (horizontal axis) crosses the y-axis.