Some good tips here on using Google+
Holding down the “Shift” key on your keyboard while dragging people between circles, preserves your selection.
You probably know that to copy people from circle A to circle B, you open circle A ("View circle in tab"), select the people you want to copy, then drag them to circle B. But if you shift-drag your selection from circle A to circle B, the selection remains intact after it's copied into circle B. You can then click "Remove" to remove them from circle A.
End result: you've moved the selected people from circle A to circle B!
Read more: Useful Tips to Enhance your Google Plus+ Experience http://www.tech.nolicio.us/2011/07/15-tips-to-enhance-your-google-plus.html#ixzz1RmxsyPhk
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