Mazda CX-5 2018 Owner's Manual page 546

NOTE
If the contact is long-pressed when the
favourites list is displayed, the contact
information can be edited (deleted,
moved).
NOTE
Practice this while parked until you are
confident you can do it while driving in a
non-taxing road situation. If you are not
completely comfortable, make all calls
from a safe parking position, and only
start driving when you can devote your
full attention to driving.