You create a multi trend log list to display values from multiple trend logs in one list so that you can compare the values.
In WebStation, right-click the trend log.
Click Create trend item and then click Multi trend list .
Click Save .
Type a name for the Multi trend log list .
Click OK .
On the Trend log list toolbar, click the Settings button
Click Settings .
Click Add .
Browse to, and select, the trend log lists you want to compare.
Click Select .
Click Edit button to configure the trend log list.
Click OK .