My C700UZ have this function too. It's called bracketing. Maybe some other photography experts here can give better explanation, but in short, this function lets you take 3 successive shots at different exposures values.
In BKT mode, you need to press and hold the shutter release button for a while until the 3 shots are over.
:bsmilie: hehe, from the way I explain this I think the experts know I'm not very knowledgeable.