Here's a neat way of moving background windows around without bringing them to the foreground. This makes it much easier if you have a lot of windows in Mac OSX but you don't want to have them take over the foreground on your desktop. 1. Hold down the Command key. 2. Click the titlebar of the window(s) you want to move around. 3. The window will move without coming to the foreground.
For more, see the original article at the link below.