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Is there a way in OS X Lion to constrain my application windows to not pass outside the desktop borders?

I hate it when I drag a window away to take a look of a window that's underneath and when I come back, only half that window shows on the screen.

Maybe not a common feature request, but it would be very neat.

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No built-in way I know of, but you can just let a window management tool "snap" your windows to the screen's edge when you drag them there. This is similar to the "Aero Snap" feature Windows introduced.

Here are a couple of tools that do this:

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