Raymarine Ray54E Owner's Handbook Manual page 68

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To make Menu selections:
1. Press and hold the CALL/MENU key to enter Menu mode. The list of
available functions appear on the dot matrix display.
2. Rotate the CH knob to scroll down the list until the arrow points to the
desired function. Push the CH knob to accept.
To exit the Menu mode or sub-mode, press the 16/PLUS or CLEAR keys, or
else select the EXIT option from the menu.
Using the Microphone Keys to Make Selections
The examples in this chapter describe how to make menu and character
selections using the CH knob on the main unit. However, you can also
press the microphone UP/ DOWN keys to make selections and then
press the microphone HI/LO key to accept.
Ray54E VHF Radio