A family of Microsoft spreadsheet software with tools for analyzing, charting, and communicating data.
Insert Comment is controlled by the Edit Objects checkbox in the Protect Sheet dialog's list.
Check that box and you will be able to insert comments (and also do things to other objects).
There is no options specifically aimed at comments. If you don't want the full effect of Edit Objects you would need to write a macro to set the comment up for you.
Bill Manville. Excel MVP, Oxford, England. www.manville.org.uk