HP Color LaserJet Enterprise CM4540 MFP series - Manual (Page 265)

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.
3. Touch the Speed Dial number of the list to be
edited.
ENWW Use Fax 245