Avidyne IFD540 Pilot's Manual page 142

User Option Item Title
Display Backlight
Chart Day/Night Mode
Chart Auto Mode
Switch Tanks Alert
4-34 AUX Pages
Description
A brightness bar that
represents the LCD display
brightness setting when User
Control is selected. This item
has no default value.
Day - Charts are displayed with
a bright white background;
Night – Charts are displayed
with the bright white
background turned off;
Auto* – Uses the selection in
the Chart Auto Mode field to
automatically determine
whether the system is using
Day mode or Night mode for
chart depiction.
Sensor* - uses the ambient
light sensor embedded in the
bezel to determine if the Chart
page will use day or night
lighting schemes when the
"Auto" selection was made on
the Chart Day/Night Mode user
option;
DimBus – uses only the cockpit
dimming bus setting to
determine if the Chart page will
use day or night lighting
schemes when the "Auto"
selection was made on the
Chart Day/Night Mode user
option.
Never* – No "Switch Tanks"