Furuno FSV-30 Operator's Manual page 131

F4: Panel dimmer
Use the [F4] key to adjust the panel dimmer.
Dialog box for adjustment of panel dimmer
F5: Erase event mark
Use the [F5] key to erase event marks successively.
Function dialog box for erasing fish marks
F6: Erase ship's track
1. Press the [F6] key. The following dialog box appears.
2. Press the [F6] key again. The oldest part of the track will be erased. Each
pressing erases approximately 10% of the track.
<<DIMMER>>
10
<<ERASE EVENT MARK>>
1 2 3 4 5
Press [F5].
<<ERASE EVENT MARK>>
1 2 3 4 5
<<ERASE SHIP TRACK>>
100 %
Dialog box for erase ship track
7. CUSTOMIZING THE EQUIPMENT
8
6 7
6 7
7-5