Open the drop-down menu under the y axis, as shown in the following screenshot:

You will get the following options for the y axis:

• SUM (Y Field): Draws a graph with the summary of a parameter in the tick interval
• COUNT FRAMES (Y Field): Draws a graph that counts the occurrence of the filtered frames in the time interval
• COUNT FIELDS (Y Field): Draws a graph that counts the occurrence of the filtered fields in the time interval
• MAX (Y Field): Draws a graph with the average of a parameter in the time interval
• MIN (Y Field): Draws a graph with the minimum of a parameter in the time interval
• AVG (Y Field): Draws a graph with the average of a parameter in the time interval
• LOAD (Y Field): Used for response time graphs

In the Y Field, you can set the parameters that you want to view.