Impact Designer provides you with the ability to delete data lists that you no longer need so that you can keep your data list inventory clean and up-to-date.
However, there may be instances where you may need to restore a data list that has already been deleted. When you delete a data list, Impact Designer stores it in a separate area so that you can restore it if needed.
From the data list page, select "Show Deleted Data Lists"
A list of all deleted data lists will be displayed. Click on Restore beside the data list you wish to restore.
Impact Designer makes it convenient for you to restore data lists so that rather than having to re-create a data list from scratch, you can always make use of a previously configured data list.