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.