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Fishfinder 90/140 Owner’s Manual 15
OPERATING YOUR FISHFINDER > USING THE MAIN MENU
3. To select a setting, use the Arrow keys to move the
selection arrow, and press ENTER. (When you reach
the end of a menu, the selection arrow wraps to the
beginning.) Press and hold an Arrow key to rapidly
advance the selection speed.
4. To close a setting or a menu, press MENU.
Using the Main Menu
From the Main menu, you can change the Range, Gain,
Scroll, Zoom, and View settings.
• To view the current menu settings, press
MENU.
• To exit any window, press MENU.
• To quickly change a setting for the current option
that appears in the upper-left corner of the screen (for
example, the Range option in the above screen), press
an Arrow key.
Options and Settings
The following settings reset to the system defaults each time
you turn on the Fishfinder.
Range—sets the maximum depth that you want the
Fishfinder to display. Auto (default) automatically tracks
the bottom, or you can set the range, 5–600 feet.
Gain—controls the sensitivity of the Fishfinder’s sonar
receiver. Auto (default) automatically sets the sonar
sensitivity, or you can set the gain. To see more detail on the
screen, increase the receiver sensitivity by selecting a higher
gain. If there is too much detail or if the screen is cluttered,
lower the sensitivity (lower the gain) to increase the clarity
of the screen.