Unique Value Filter in Tools JX

Hi there,
This is likely a stupid question, but is it possible to show unique values if there are several lines with identical identifiers? What I mean is: I have a table for which I'm not showing all information, so several lines are shown with the same exact values (because the column with the different values isn't shown). What I'd like to see is that the lines with the same data show only once.
Is there a setting for this?
Thanks in advance!
Regards, Roger