Furuno FSV-30 Operator's Manual page 133

6. Select function key for which you want to erase its program.
7. Press the [MENU] key.
8. Select QUIT and press the [MENU] key.
9. Select QUIT at the top of the menu screen and press the [MENU] key to
close all menus.
7. CUSTOMIZING THE EQUIPMENT
QUIT
CANCEL
F1
F2
F3
F4
F5
F6
Function key dialog box
7-7