JRC JMA-3300 Series Instruction Manual page 155

Using user keys
Operates as user keys.
Displaying the menu assigned to the user key1
Hold down the [GAIN] control.
Displaying the menu assigned to the user key2
Hold down the [SEA] control.
Displaying the menu assigned to the user key3
Hold down the [RAIN] control.
Chapter 2 OPERATIONS
2.13 CONTROL SETTING
2-109
2