BENDIXKing AeroNav 910 Pilot's Manual page 101

AeroNav 900/880 Series Pilot's Guide
legs 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 situational
awareness. The preview feature is available whether
modifications are being made on the ground or airborne. While a
preview is being displayed, an temporary annunciation will be
shown on the map describing the modification in progress.
Examples of those annunciations are "FMS Preview - Waypoint",
"FMS Preview - Airway", or "FMS Preview – Approach.
Previewing a Flight Plan While Building It
89000039-010
Rev 1 May 2019 FMS Subsystem 3-7