Speed Calibration (Advanced, With Temp/Speed Only); Digits Format (Advanced); Demonstration; Sound Control - Humminbird 561 Operation Manual

Speed Calibration will adjust the speed readout by the percentage entered,
and will appear in the menu if a Temp/Speed Accessory is connected and the
paddlewheel has moved at least once.
Digits Format adds a tenth decimal place to readouts such as Temperature and
Depth. The format can be changed to small format, large format, or no format.
Demonstration controls whether the Demonstration Mode is visible or off. The
Demonstration Mode appears on the screen if you don't press any keys during
the warning screen at power up. Menu settings cannot be saved in
Demonstration (see Power On and Start-Up Options Menu).
Sound Control allows you to set when the control head will beep or sound
because of key presses and/or alarms.
Speed Calibration
(Advanced, with Temp/Speed only)
Settings: -20% to +20%; Default = 0%
Digits Format
(Advanced)
Settings: Small tenths, Large tenths, No tenths; Default =
Small tenths

Demonstration

Settings: Off, Visible; Default = Visible

Sound Control

Settings: No Sounds, Alarms Only, All Sounds; Default =
All Sounds
64 Setup Menu Tab