(Maitre'D 2005, from Service Pack 1 and later versions of Maitre'D)
P.O.S. Control / Employees / Configuration / Order
You can ask for a confirmation for all clients when putting a Course on
Hold for one client on table where multiple clients have items separated
by courses.
Course Confirmation:
Enable the following option to prompt for "All Clients" when
putting items on Hold.
Note: The Fire and Hold options above must also be enabled.