There are a couple of ways to show additional information, one is by using the MENU to SORT... for example, if from the root menu you have selected TRACK, you'll see the track names listed. You can then sort them by pressing the MENU button and selecting one of the sort options (which can be set below). That will then show that sort criteria as the 2nd column.
If you want to have a default set of info displayed (but not sorted), you can change that within rekordbox by clicking on your USB device, then select the COLUMN tab and change your preference.
Note that you can also change your Category and Sort options here; simply add any additional criteria you wish to use.