How do I choose what information is displayed in the Library?

The track information display area can be customized to display the columns that will help you the most. 

Click on the column button, the left pointing arrow, and you can select which columns you want to display.

To sort your library by a column, click the column header so it highlights. For example, clicking the BPM column will sort your music from slowest to fastest. To move a column, drag the header to the left or right.