Canon MF6180dw Manual page 73

(1) Click [No.], [Type] or [Name].
(2) Click [Edit].
(3) Select the destination to be deleted from [Members List] and click [Delete].
(4) Click [OK].
To change the name of the registered group dial
(1) Click [No.], [Type] or [Name].
(2) Click [Edit].
(3) Change the name of [Group Name] and click [OK].
To delete the registered group dial
Click [Delete] of the group dial which you want to delete.
4
Click the unregistered [No.], [Type] or [Name].
5
Select [Group] in [Destination Type to Register] and click [OK].