Avidyne IFD540 Pilot's Manual page 60

COOL FEATURE
PROC button The "PROC" function key on the
bezel acts as a shortcut for attaching a published
arrival or approach procedure to a waypoint in your
flight plan. It can be used at any time. The first press
of the function key results in the IFD displaying the
"FPL" tab (Map-FPL view) of the FMS page with the
Approach field of the next destination after the
active leg highlighted in reverse video and a drop
down box of available published approaches listed.
Pressing it a 2nd time will step the reverse video
over the Arrival field and present a drop down box of
available published arrivals. Each subsequent press
of the "PROC" key will step through all following
destination airfields approaches and arrivals in the
flight plan and wrap back around to the top of the
flight plan. When you have the drop down box over
the intended field, use either the bottom right knob
on the IFD or touch the list to scroll up or down the
list until the desired procedure is selected, then
push that knob in to add that procedure to the flight
plan.
If there is no flight plan, then pressing the "PROC"
function key will present the "FPL" tab on the IFD
with an insert cursor at the top of the page but will
not present any procedures.
TIPS AND TECHNIQUES
Changing Selected Approach Type on Final
If a VHF-based approach has been activated and
then is replaced with a new GPS-based approach
prior to activating the missed approach, it may be
necessary to manually change the nav source mode
(e.g. manually change VLOC to GPS if switching
from an ILS to a RNAV).
2-22 FMS Pages