Hi,

I have two columns of numbers of about 5,000 rows. EG:
1 8
2 3
6 2
3 5
In this example I just want the numbers 2 and 3 to be left showing in the
left column.

I would like to show only the numbers in the first column that don't have a
corresponding matching number anywhere in the second column. (Or highlighted
in colour.)

Is there a way to do this?

Rob