Importing PDF files
You can import a PDF file into your EndNote library. EndNote will create a reference for the article, attach the PDF and store the article in your Data folder if the article you are attaching includes a DOI (see below) on the first page.
Click on the Import Button on the library toolbar. In the dialogue box that appears use Choose to find where your PDF document is saved. For your Import Option choose PDF (instead of a filter) and keep your Import into Duplicates Library option. Your dialogue box should look something like this:
Importing PDF dialogue box
DOI (Digital Object Identifier)
To create the reference with information in the correct fields the PDF must have a DOI (Digital Object Identifier). This is like a unique address for the article. DOIs have been allocated since 2000; older articles do not usually have one. If this is the case, EndNote will create a blank reference and attach the PDF document. You will need to fill in the details manually.
You can also import a folder of PDFs by going to File >Import > Folder.
Import into Duplicates Library
Selecting the Import into Duplicates Library option in the process above is important as it avoids duplicates in your Library. Duplicates within a library can lead to repeat references in Bibliographies, which can be tricky to resolve.
To search for duplicates in your library, go to References > Find Duplicates. EndNote will show you any duplicate references within your library. (See Finding duplicates)