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Keypad instruction
Plotter function
：
Moving the cursor upward or to change the setting.
Sounder function
：
Moving the VRM upward.
Plotter function
：
Moving the cursor to the right.
Sounder function
：
Long Press
-
Activates feeding rate selection for picture advancement
Short Press
-
Setting the depth range (setting upper range limit.
MENU Pressing it once displays the menu of the current
Page, pressing it twice enters the main menu.
P Sounder Function
：
Long press
-
Activates split ratio selection.
Short Press
-
Displays the menu of the screen
that has >50% screen coverage.
Display the seven main screens circularly, turnover
the listed interfaces.
Plotter Function: Press and hold to change track color.
Sounder Function: Press and hold to activate sonar
