I have an excel spreadsheet that has around 1000 rows. Most of these rows will contain nothing of value to my task. ~ 30 will and I only want to keep those 30. I know I can find rows based on some criteria. But I would like to use the list of keys for the rows I want to keep, and delete all of the other rows for the worksheet. kind of "like a find when not in" logic?? Any ideas?