OR: Add on to end of route. Input a waypoint (thats not on your route!) - I use 'A' for simplicity, followed by the desired fix/Lot-long. Delete previous waypoint to create route discontinuity. New 'floater' is visible enroute, but will not be reported by CPDLC (if you have it) as it will never be active. Works for 767 Pegasus and 757 PIP...
UE