Furuno COLOR VIDEO PLOTTER 1833C Operator's Manual page 17

Soft keys
The function of the five soft keys changes according to the operation. Their
labels for their current functions are shown on the screen to the left of the keys.
To hide or show the soft keys, press the [HIDE/SHOW] key. Each press of the
key shows preset soft keys, user function keys or turns off navigation information
(at the top of the screen).
Some soft keys show the current station of the soft key function in reverse video
as shown below.
3nm
12/
LP
H-UP
Current option shown in reverse video
Radar Display
Display unit
M
319. 9
TRAIL
TRAIL
ON /OFF
TRAIL
TIME
GRAD
SINGLE
TRAIL
COLOR
RETURN
359.9 ˚R
+
11.70
nm
Radar and plotter displays
1. OPERATIONAL OVERVIEW
SOFT
KEYS
34 22. 3456'N
080 22. 3456'E
16.0nm
WP-002
FISH
BRIDGE
Plotter Display
359.9 M NU
TRIP
19.9 kt 99.9 nm
MARK
ENTRY
MODE
NTH UP
NAV
POS
D. BOX
ON/OFF
1-3