I'm not sure what I did, but somehow I've managed to hide all but one of the tracks in a song I was working on. When I play the song, the tracks that aren't visible still have audio, but I can't find or interact with any of them. I've sat here for about a half an hour looking for a menu option or a keyboard shortcut (the documentation mentions that you can hide tracks, but it doesn't actually say how). So, I need to know how to gain access to the hidden tracks. Any help is greatly appreciated!

Try "H" to bring up the Track Manager. The Track Manager may also be on the Tracks menu in the Track view.

That worked. I didn't think to try shift+shortcuts (although I do feel like there should be a menu option somewhere in the track view pane). Thanks a lot!