A cursor can be used to precisely measure the level at a particular point in time.

 

To the bottom-left of the graph is a three-button control. The left-most looks like a cross. In order to use the cursor proceed as follows:

• Press on the button that looks like a cross (see Figure 3 (3))

• Place the mouse over the point where the X and Y cursor lines meet and left-click. This grabs the cursor.

• Drag the cursor to the specific curve and time of interest. The cursor can jump from one curve to the other.

• Read the X and Y values in the cursor field underneath the graph.