When the Cards tab is selected, all the available and selected card-templates are shown. By clicking on the button, the template with all the settings and configurations will be loaded in the Main interface.
The available card-templates can be divided by groups which can be selected from the drop down menu directly under the tab.
Card-templates, the availability, the position in the menu, etc., is defined via the Card manager.
For more information, please see our "Using the Card Manager" section of this Help file