Canon MF6180dw Manual page 70

(3) Select the group of which name will be changed using [
(4) Select <Name> using [
(5) Change <Name>.
"Entering Text"
(6) Select <Apply> using [
(7) Select <Apply> using [
To delete group(s)
(1) Press [ ].
(2) Select <Delete From Address Book> using [
When the address book PIN is selected
Use the numeric keys to enter the PIN and press [OK].
] or [ ] and press [OK].
] or [ ] and press [OK].
] or [ ] and press [OK].
] or [
] or [ ] and press [OK].
] and press [OK].