How to Navigate Your Zotero Library
Zotero is organized like an iTunes library.
The Left column is where collections are stored (like playlists in iTunes). Zotero automatically populates the Duplicate Items collection and the Unfiled Items collection whenever it finds an item you have duplicated or have not filed.
The Middle column displays the individual items within the collection you have selected in the left column. You can add additional metadata to the center column (by clicking the icon to the right of Creator) if you want to see more than Title and Creator at first glance.
The Right column displays the bibliographic data for the item you have selected in the middle column. Use the other tabs in this column to add notes (which are searchable in Zotero), tags and see related citations. All information in this column is editable.