Searching Multiple Online Resources
You may wish to search multiple freely available information resources at once to save time. This is theoretically possible. However, it is important to note that difference database providers work with different technical systems.
As soon as you send your search terms to multiple databases, Citavi identifies which fields and search options are shared by the databases you chose. If a limited-function database is among your choices, searching multiple resources at once will reduce the number of search options available to you. For complex searches in particular it is best to search one resource at a time.