Unlock preview the preview window
Make it possible to unlock the preview window so that you can move it to another screen. Why? If you have another monitor where you like to blow up the preview window or if you are using AirDisplay on your iPhone or iPad. Must be easy not to make that window conform to the main screen. But I think it should have the option to lock/unlock kind of like the mouse has. That together with a second preview window = even sweeter.