I am trying to use the count function on text in a totally different way...

I want to put the word DUPE or some type of flag in one column based on
whether or not COUNTIF on a different column is greater than 1

So instead of having to eyeball a column to look for formatted columns
indicating that a conditional formula has been met, i'd like a way to use the
autofilter tool on a different column so that only (and all) rows with
duplicates display .. so i can work with just those.

thanks.