How to Cancel an Itinerary @ Sabre?

It is possible to cancel the whole itinerary or specific segments @ Sabre.

XI             -   cancels the whole itinerary

X2            -   cancels segment 2

X3-5         -  cancels consecutive segment 3-5

X2/4/6      -   cancels non-consecutive segments 2, 4 and 6

Sabre...