I just installed Office for MAC 2011 a few days ago and could not find how to trouble shoot this. In excel, I would expect fn F2 will highlight (or prompt) the respective cells that contribute to the formula. (eg a x b = c). So when I put the cursor at C and press fn F2, in Window Excel it will highlight the cell at a and b, but it didn't show. This there somewhere I can turn it on or nothing can be done about it.