Sometimes you will want to view your script two or more different ways. Select Window, New Window. You will get a second window with the same script in it.The windows can be the same view, or different, the same location, or different.
When you make a change in one window, you will see it change in the other window too. You can bring up as many views of the same script as you wish. And any edits in one window will be reflected in the other windows.
You can also bring up as many different scripts at once as you wish. You can cut and paste between windows or just work on each separately. You can not drag and drop between windows.