how to return parts of records from a function

Hello.
I think I need som help on this function I write in plpgsql
I want to return
CREATE OR REPLACE FUNCTION gList(tid_ TIMESTAMP) RETURNS AS $$
DECLARE
rec RECORD;
BEGIN
FOR rec IN SELECT DISTINCT custid,action,nr FROM ...
IF rec.action = ...
END IF;
RETURN NEXT ???????????????
END LOOP;
RETURN;
END;
$$ LANGUAGE plpgsql;

I want to replace the ????????? with something that will contain both
rec.nr and rec.action. What should that looklike? rec.nr ,
rec.action ?
And what should I write after RETURNS .... in the first line? RECORD?

Oh, now that I write this I understand that I could replace the RETURN
NEXT in the loop with a single RETURN QUERY at the end... I don't know
if that will be good, but I still would like to know how to return the
separate fields from the rec record.