Avidyne IFD540 Pilot's Manual page 58

and the runway does not belong to the arrival, the arrival is not
accepted in the flight plan. A labeled white vertical line then
brackets the procedure in the flight plan as another visual cue
that the procedure is part of the flight plan.
Adding an Arrival
TIPS AND TECHNIQUES
FMS Preview
A FMS Preview mode is available on the FPL tab
(split Map-FPL view) of the FMS page. As soon as
changes start to be made to the FMS flight plan
while on that tab, real-time overlays of the edited
procedure, hold pattern, waypoint or airway are
presented on the map in cyan. There may be a few-
second delay when drawing the edited route as the
system determines the optimum map range for
display. This feature provides a graphical preview
of the edited route before it is officially part of the
flight plan, to aid in flight planning. It can be used on
the ground or in-flight and is additionally identified
by an annunciation on the map part of the tab, "FMS
Preview - <type field being edited>".
2-20 FMS Pages