Call dbms_output.new_line to create a new line
SQL> SQL> set serverout on SQL> begin 2 dbms_output.put( 'One' ); 3 dbms_output.new_line; 4 dbms_output.put_line( 'Three' ); 5 dbms_output.put( 'Four' ); 6 end; 7 / One Three PL/SQL procedure successfully completed. SQL> SQL> --