Superscript in Excel

I use Excel 2000 with Windows 2000 pro. Is there a pre loaded shortcut for making superscripts?

Much like I can use control+i to change back and forth between regular font and italics within the same cell, I want to be able to do that with superscripts. I have been able to format the entire cell for superscripts, auto produce a superscript as the last character within a cell and perform individual resets within cell via the mouse (by shading, format, check/uncheck superscript box). But I want a shortcut key.

Macros have been fairly easy for me to set in the past, but I haven't been able to produce a macro for this. I don't know enough about editing macros to solve my dilemma, but I'm willing to learn.

Can I do that?

Rick