Janet, when you saved it in Excel 2007, did you Save As the 2007 format? If
so, you should be able to add more columns.

"Janet" wrote:

I have just taken over a spreadsheet from a coworker. They have reached the
last column in Excel 2003. I have saved it on my computer in Excel 2007, how
do I add columns. I know the basics of Excel, but am FAR from knowing it
all. Any help would be greatly appreciate. Thanks, Janet