You can view and sort the references in the library with various options to make these settings (4) steps:

Steps 1-2: Click on View (1) > Manage columns (2).

Steps 3-4: Make the settings (3) according to your preferences > click on Save (4).

You can mark reference(s) as Favorite, Unfavorite, Read, Unread. (3) steps to make these settings:

Steps 1-2-3: Click on reference(s) (1) > Marks as (2) > make your choice (3).