When the Include Linked Full Text Journals when using the Full Text Limiter setting is enabled in a profile's Basic Settings, you can select the Full Text limiter and receive Linked Full Text (via SmartLinks+), along with the full text results on the Result List.
When this limiter is used it is limiting results to a series of collections. Each collection is made up of all of the full text titles in a subscribed database and configured using each title's expected coverage. Whenever you conduct a search using the limiter, the search takes place within all of these collections; if the title is found in one of the collections, it is matched against the date range logged for that title. It then goes through the rights checking process to see if full text is available for that article. If full text is not available, the result will display on the Result List without a link to full text.
Also included are CustomLinks that are set as type "Full Text" or "Library Catalog" and have collections set as filters within EBSCOadmin. Customlinks can be a source of external Full Text so they are also displayed when the Include Linked Full Text Journals when using the Full Text Limiter setting is enabled.