You can easily change the order of the resources in your library by clicking on the relevant header. For example, to sort by date click on the Year header, or to sort by Author's last name click on the Authors header.

The icons next to the titles of your references indicate what kind of files they are.

 PDF document

 Microsoft Word file

 Website

If no icon is present, the reference is just a citation without a full-text document attached.

Clicking on the star next to a reference will mark it as a favorite. The green circle icon next to a reference indicates that it hasn't yet been opened. Clicking on the headers for these columns allows you to sort by favorites or by read/unread.