How to find list of individual songs in iTunes?

In my iTunes, I used to be able to find the whole list of songs. Now all I can see is a list of playlists down the left side. I can't find any way to get it to list all of my songs. Only when I put in something new can I see the list of songs in the new item, such as an audiobook, for example.

I want to check my list to see exactly what I have, but can't see any song unless it is in a playlist. How can I see a list of all my songs?