Panasonic KX-T336 System Reference Manual page 672

5. 5~ z-tssing the F2 key T ) or the F3 key ( & ), move the
curs:' to the target ex?%sion numbe- TO be set/canceled "DND"
or cz-ceded ',FWD."
Note: F-.rrigning FWD is c?available by this operation.
6. Self: setting item by pressing the F6 key (select).
For canceling the function, select m mark.
7. Press the F7 key (memory) to store tie selected data.
6-J-l 2