Drag'in is a cool control panel that makes drag'in windows a lot more useful. When you drag a window, instead of the outline of the window, you'll drag the window.
Drag'in also has a really cool option called "Multitask while drag'in". If this option is turned on, via the options dialog in the control panel, you'll be able to move around windows and still continue processing while you are doing it. To see an example of this, duplicate a big folder, and move around the progress dialog. You'll notice that the duplication is still happening, even though you are moving the window. Way cool!
To temporarily disable Drag'in, hold down the option key when you are starting to drag.
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