Zoom in and out of a graph area

Use the (Increase Time Span) and (Decrease Time Span) toolbar buttons to adjust the amount of viewable data.

Click the Increase Time Span button to show more data.
Click the Decrease Time Span button to show less data.
Click the Restore Chart button to restore the chart's view.

To zoom into the time scale (X axis)

Click and drag the mouse horizontally across the time scale (X axis) to select the graph area that you want to zoom into.
Release the mouse button to view the selected area.
Repeat steps 1 and 2 until you have the desired view of the graph area.