Annotating PDF materials enables you to record thoughts, impressions, or ideas for usage within each individual source.

To annotate a PDF:

1. Select the citation in your EndNote 20 library and click on the PDF button in the right-hand preview panel. This will open the PDF in the side panel. In the top right-hand corner of the panel, there is a pop-out button that will open the PDF in a new window if you want to make it full-screen.  
2. Click on the comment icon at the top left of the PDF window to open the annotation toolbar. 
3. In the annotation toolbar, you will have the option to highlight, underline, or add a comment to your PDF.
4. To use one of these tools, highlight the text in the PDF, and then click the appropriate icon. 
5. To save your work, use CTRL + S or close the window and select the option to save. 

Any annotations that you make to a PDF in EndNote will remain saved for the future, and if you share your library the annotations will be shared as well.