Avidyne IFD540 Pilot's Manual page 41

Flight Plan and Scroll Bar
COOL FEATURE
Geofill™ is a geographic-based prediction
algorithm that significantly reduces the number of
pilot actions for entering waypoints. Usually after the
first character entry, the system uses existing
characters to determine the closest, and most likely,
waypoint based on your geographic position or
existing flight plan.
If a flight plan has more legs than can be displayed on a single
page, a scroll bar is presented along the right edge of the flight
plan. It indicates where the viewable window is with respect to the
entire flight plan as well as where the active leg in the flight plan
is. In the image above, the magenta vertical rectangle in the scroll
bar indicates the active leg is just below the origin. There are a
number of flight plan legs out of sight below the bottom of the
display.
FMS Pages 2-3