To organize your library, you can create folders by clicking on the Create Folder button or the text Create Folder in the side bar. Files can be dragged from the main library into the newly created folder.
Highlighting and Adding Notes
For references with an attached document, such as a PDF, you can open the document by double-clicking on the reference in Mendeley. Along the top of the screen are mulitple viewing and editing options.
The Highlight button will allow you to highlight text within the document. The Note button will allow you to add notes to the document.