On the one-touch buttons, items registered on the address book No. 01 to 16 and speed dial numbers 001 to 016 are registered automatically.
One-touch buttons can be used for Scan To E-mail, Fax, and Internet Fax operations.
To select the speed dial numbers 009 to 016 that are assigned to one-touch buttons, press and hold the 
(SHIFT) button and press the one-touch button.
