The program comes with a number of pre-created Smartlists. Some of them you must enable, and others are automatically displayed.
To enable some of the built-in Smartlists, right-click on Playlists in the tree and selecting "Create Stock Smartlists". This creates a Smartlist folder under Playlists in the tree, in which you will find a number of Smartlists, including: "4 or 5 stars" (for your favorite files), "100 Random Songs" and "Missing Cover Art".
Other Smartlists are automatically generated and need not be enabled.. These are located under Playlists in the tree:
This Smartlist tracks the 100 files that have been played most often. You can edit the smartlist's search criteria by clicking on the smartlist once, and editing the fields in the smartlist bar above the list.
This Smartlist tracks the last 100 files to be played. That number can be changed by clicking on the smartlist once, and editing the fields in the smartlist bar above the list.
This Smartlist is automatically generated when you import files. It will be deleted when you exit the program but will be recreated again on the next import. If you want to keep the smartlist, go to Tools > Options > General > Advanced and uncheck "Clear 'Recently Imported' playlist on exit".
This Smartlist is automatically created whenever you rip a CD. It will be removed when you exit the program