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JMA-9100 Instruction Manual > 2.CONTROL PANEL KEYS and SOFTWARE BUTTONS > 2.3  FUNCTIONS OF SOFTWARE 
BUTTONS
Numeric information: AIS target information
  Detail / simple display switching
This function switches the display mode to detail / simple display when AIS target 
information is displayed.
  Unread message display
When there is an unread message from the AIS target that is displayed, the message is 
displayed. If this button is clicked, the message is displayed.
①:Detail / simple 
display switching
②:Unread message 
display
simple display
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