Changing the method for displaying the counters
In many cases, it is useful to display the counters as lines instead of bars. Or, you might want to see the ratio between the counters.
To view these charts, you must change your selections under Type of counter display on the Counters page of the Properties window and under Chart type on the Graphics page of this window.
If a data view contains counters represented by numeric values and counters expressed as percentages, the chart has two scales, one for the numeric values and one for the percentages.