In the Expression Builder, select the Data Sources tab.
Double-click the ID field and type a new name for the data source alias.
Click the Add Data Source button. The Data Source Browser appears.
Select a data source and click OK. Configure the data source as required. For data source-specific information, see Data Sources.
If you want to configure time update settings for the expression, click the Advanced Settings button. For more information on how to configure time update settings, see To set data source time update options.
Add additional data source aliases as required. If you need to add more rows, click the More button. Five new rows will be added.