You can add files to Mendeley by:
Export references directly from other Elsevier products such as Science Direct or Scopus to Mendeley by:
Import your Endnote, Refworks or Zotero library to Mendeley
Make changes to your Mendeley Library on the web by clicking on the "Library" tab.
Note: Remember to sync in Mendeley Desktop to make sure your changes are active everywhere you access Mendeley.
Save references directly from the internet into your Mendeley library using the Mendeley Web Importer.
To edit PDFs that have been added to your library by double clicking (to open the file in a separate tab within Mendeley Desktop). You now have the option to: