HP LaserJet Enterprise M4555 MFP series - Manual (Page 249)

4. Touch the down arrow on the Speed Dial
Name box to open the drop down menu and
then touch the Fax Numbers option.
5. Scroll through the list of fax numbers and touch
the screen to the right of last digit of the fax
number to be deleted. Use the backspace key
to delete the fax number.
6. Touch the OK button to return to the Speed
Dials screen.
7. Touch the OK button to return to the Fax
screen.
Add a number to an existing speed dial list
1. From the Home screen, scroll to and touch the
Fax button.
2. Touch the Speed Dials button to display the
Speed Dial screen.
ENWW Use fax 229