In my original post, I had said that A1 could be any number from 1 to 10. But, if it were a 1, 2 or 3, then it would have to be edited against a value in B1. And, based on B1, the value in A1 would automatically be changed to a 1, 2 or 3. If, on the other hand, A1 were keyed with anything...