A colleague of mine has an Excel spreadsheet (a fairly large one...but it
appears it should be well withing the capacity of the program) which has many
columns containing formula

He is convinced Excel is hanging because it has all these calculations to
do. But I would think that forumla are only executed when any of the
referenced cells change...so I don't see the spreadsheet executing all these
forumlae on save, open or close.

Am I correct, or is he?

Thx for the help