I accidentally pressed the number "1" key when opening iTunes earlier on my Mac and a little pop-up window appeared for a split second (similar to the one that says "updating library" after a version change). Nothing has happened to my library as far as I can tell but I'm curious as to what pressing the "1" key actually does. I have since closed iTunes a few times and pressed "1" and the same window pops up very briefly but I can't read what it says. When I don't press it, iTunes opens normally. Any ideas?