This option is only applicable if you have more than one script in your script file. By enabling this option, only modules for the script selected within the Show Controls section will display in the Device List section. This is helpful by only displaying modules for the selected script as all other modules are hidden.
Modules that are not in the current script you are firing can be hidden by selecting menu within the Control Panel device list in the upper left corner. Then, select more, followed by settings. You will now be presented with a system-wide settings page. From the settings page you can select to hide modules not in selected script.