Humminbird Matrix 77c - Manual (Page 17)

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Sonar Menu Tab
Press the MENU key twice to access the Main Menu
System and then press the RIGHT Cursor key to select
the Sonar tab.
NOTE: 83 kHz Sensitivity, Depth Lines, Surface Clutter, Noise
Filter, Max Depth, and Water Type only appear in Advanced
User Mode.
Sonar Menu
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Zoom Level
(Sonar Zoom View Only)
Zoom Level sets the magnification level for the Sonar Zoom View, and is only
available on the X-Press™ Menu when the Sonar Zoom View is active. Use Zoom to
increase the display resolution to separate sonar returns that are very close together.
To adjust the Zoom Level:
1. Highlight Zoom Level on the Sonar X-Press™ Menu.
2. Use the LEFT or RIGHT 4-WAY Cursor Control keys to change the Zoom Level
setting for the Sonar Zoom View. (2x, 4x, 6x, 8x, Default = 2x)
NOTE: The Zoom Preview Box tracks the bottom and cannot be moved by the user.
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