The optional chart displayed for each parameter can be one of the following types:
A line chart (the default), which represents activity using a continuous line
An area chart, which is the same as a line chart but with the area between the line and the horizontal axis filled
Choose Setup from the Options menu.
Performance Meter displays the Setup dialog box.
Select the Solid choice button for area charts or the Line choice button for line charts.
(Optional) Select the Show Limit Line checkbox if you want your charts to indicate the threshold value using a line.
Click Apply when you are satisfied with the changes you have made.
Performance Meter displays the information using the specified charts.