About hover Captions

Im currently working on a project in which I need my hover captions to pop up in an area away from the symbol. I need the caption to pop up in the same place for 5 different symbols each containing different material. Also when putting words in a a hover caption box, how do you make the words you are typing go to the next line when it has reached the end( i guess im trying to ask how to type a paragraph in a hover caption).

thanks in advance