I have had this problem when opening files sent to me by co-workers. They
created the files on Macs. Could be part of the problem, but it is not
consistent. When you maximize the window you can just barely see the "a"
column all the way over to the right of the screen. You can't "drag" the
sheet over to the left to fit the window. The only way I've been able to
view the file is to set excel to View - Workbook Views - Full screen. Not
sure how to get around this otherwise