To add a new controller, click on the tab at the bottom-left corner of the screen, as shown below:

A new window will appear,  allowing you to name your controller. Add a name and click on the  button, as shown below:

The configuration screen of the controller will be displayed. At this stage you can click on button, to add the new controller to the list, as shown below:

To configure the input and output for your call logging data, refer to the Configuring a controller section.