So I open up iTunes for the first time on my MacBook and the window is so big, that the size adjustment corner is off the bottom of the screen while the top of the window is as high as it can go. Normally, you would just hit the green plus button, but in iTunes that makes a mini player appear. Any idea how to adjust the window? I figured it out. I decreased the screen resolution to get the entire window on the screen. Then resided the window to make is smaller. Then reset the screen resolution.