Furuno FCV-1100L - Manual (Page 32)

2. MENU OPERATION
2-2
6. Press the [-] or [+] key to change the setting. For items having several
options, a scroll bar (blue) appears. This bar shows the current cursor
position in relation to the entire option range. This bar shifts with operation of
the [-] or [+] key.
The blue bar shows the current cursor position in
relation to the option range.
This bar shifts with operation of [-] or [+] key.
Blue bar
CUSTOM STD HUE1 HUE2 HUE3 HUE4
Selection window (for item having several options, for example, HUE)
7. Rotate the [FUNCTION] switch fully counterclockwise to choose EXIT.