Eagle Electronics FISHMARK 640C - Manual (Page 64)

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Sonar Alarms menu with Fish Alarm selected. The check box to the left
is blank, indicating the alarm is turned off.
To turn the Fish Alarm on:
1. Press ALARM |
↓ to Fish Alarm|
ENT | EXIT .
2. To turn off the alarm, press ALARM |
↓ to Fish Alarm|
ENT | EXIT .
Backlight and Contrast Level
When you turn the unit on it defaults to the maximum backlight level.
To adjust the display's backlight level select
S CREEN
from the Main
Menu. From the Screen menu you can adjust the Contrast and Bright-
ness levels by using the slide bars. The backlight level can also be con-
trolled by using the
PWR key. Pressing the PWR key will scroll the unit
through three different lighting levels.
From the Screen menu you can also select D ISPLAY M ODE
. See the follow-
ing image. In Display Mode you can adjust the unit's screen settings
from either Normal, High Contrast or Night View. The Display Mode
setting you choose will probably depend on your fishing conditions.