Docked windows are great, but are sometimes just a bit too small. They are sometimes holding more information (find results, or stack trace come to mind), than the real estate they’ve been given. You can easily resize the dock panel, but that will replace other real estate that you’re probably also looking at (which is the reason you have the panel docked in the first place). This trick will allow you to quickly change a docked panel, into a floating window (that can easily be moved out of the way [second screen???]), and when you’re done, easily snap that floating window back to the original docked panel location.