There is a new The new Groups feature on the EndNote X2 menu bar . This allows you to sort your library into subcategories. This may be particularly useful for thesis writers .of long documents with many references.
If you are only using a few references for an essay you may wish to turn this feature off as it can be distracting You do not have to use this feature. To remove the Groups pane go to Groups on the top menu. Go to Groups | Show Hide Groups
The first categories
The Groups pane at the left of the Library main window has
been divided into five categories: Temporary | Custom | Smart | Online Seach | EndNote Web
...