Did you hit enter have you applied the format change?

And you can't do this kind of formatting to formulas or real numbers.

It has to be text.

If you do this a lot...

John Walkenbach has a helpful addin that you may like:
http://j-walk.com/ss/excel/files/supersub.htm

allan wrote:

When I use the superscript option after selecting just a portion of the cell,
the superscript appears during edit mode only. How do I get it so it appears
as superscript on the spreadsheet or when printing? Again, I'm only trying
to superscript part of a cell's contents, not the entire cell.

--

Dave Peterson