Humminbird 400TX manual

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Options. The Options Menu is a series of linked menu functions used initially to set your preferences Once your preferences are selected, it is unlikely these functions need to be accessed during the normal operation of the product.

There are eight Option menus: Contrast, Units, Fish ID, Numeral size, Transducer, Display Speed, Bottom Black, and Reset. Press the view key at any time to exit options and return to normal operation.

Contrast. The Contrast function allows the user to control the level of contrast of the LCD display. The 400TX will automatically adjust the display contrast to compensate for changing ambient temperatures; however, some situations may occur where manual adjustment will provide a higher level of contrast.

Eleven contrast settings, +5 to -5, are possible. The display contrast will change as the adjustment is made so the optimum level of contrast can easily be adjusted. Use the ARROW buttons to highlight the desired selection.